Wikipedia

San Luis Obispo County, California

San Luis Obispo County (/sæn ˌluːɪs oʊˈbɪspoʊ/ ⓘsan-lu-is-o-bis-po), officially the County of San Luis Obispo, is a county on the Central Coast of California. Its population was 282,424 at the 2020 census, and the U.S. Census Bureau estimated 282,367 residents on July 1, 2025.[11] San Luis Obispo is the county seat and its largest city by population.[4][5] The county has 3,301 square miles (8,550 km2) of land,[2] extending from the Pacific coast across the Santa Lucia Range to inland valleys and the Caliente Range.

San Luis Obispo County
County
County of San Luis Obispo
Hearst Castle with twin towers on a wooded hillside
Hearst Castle in San Simeon
White buildings and trees in downtown San Luis Obispo
San Luis Obispo
Morro Rock and the town beside Morro Bay
Morro Bay
Beach and pier beside Avila Beach
Avila Beach
Downtown buildings and cars in Paso Robles
Paso Robles
Open grassland below the Caliente Range
Caliente Range from Carrizo Plain
White flag bearing the circular county seal
Flag
Circular county seal depicting coastal and mountain landscapes
Seal
County name in white on a blue outline of the county
Logo
Motto: 
"Not For Ourselves Alone"[1]
Map
Interactive map of San Luis Obispo County
Map of California highlighting San Luis Obispo County on the central coast
Location in the state of California
Coordinates: 35°23′N 120°27′W / 35.39°N 120.45°W / 35.39; -120.45[2]
CountryUnited States
StateCalifornia
RegionCalifornia Central Coast
FormedFebruary 18, 1850[3]
Named forSaint Louis, Bishop of Toulouse
County seatSan Luis Obispo[4]
Largest city (population)San Luis Obispo[5]
Largest city (area)Atascadero[6]
Government
[4]
 • TypeGeneral-law county
 • BodySan Luis Obispo County Board of Supervisors
 • Chair[7][8]Jimmy Paulding
 • Vice chair[7][8]Bruce Gibson
 • Supervisors[7]
List
  • John Peschong, District 1
  • Bruce Gibson, District 2
  • Dawn Ortiz-Legg, District 3
  • Jimmy Paulding, District 4
  • Heather Moreno, District 5
 • Chief executive officer[9]Matt Pontes
Area
[2]
 • Total
3,616 sq mi (9,370 km2)
 • Land3,301 sq mi (8,550 km2)
 • Water315 sq mi (820 km2)  8.7%
 2020 Census Gazetteer
Highest elevation
[10]
5,106 ft (1,556 m)
Population
 (2020)[11]
 • Total
282,424
 • Estimate 
(2025)[11]
282,367
 • Density85.56/sq mi (33.03/km2)
GDP
[12]
 • Total$24.505 billion (2024)
Time zoneUTC-08:00 (PST)
 • Summer (DST)UTC-07:00 (PDT)
Area codes805 and 820[13]
FIPS code06079[2]
Congressional districts19th, 24th[14][15]
Websitewww.slocounty.ca.gov

The county was established in 1850. Its history includes Chumash and Salinan communities, Spanish missions, Mexican ranchos, and the development of agriculture, railroads, and coastal shipping. Cal Poly opened in 1903, and military training installations expanded during World War II.

Service industries account for most employment, including government, education and health care, and leisure and hospitality. Agriculture includes strawberries and wine grapes, the county’s two highest-value crops in 2024. The county is also home to Hearst Castle and Diablo Canyon Power Plant.

History

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Indigenous history

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Archaeological evidence documents thousands of years of coastal occupation in what is now San Luis Obispo County. Excavations around Morro Bay have identified fishing communities dating to the Millingstone Horizon.[16] Chumash communities lived around Morro Bay and Los Osos,[17][18] while Salinan communities inhabited the vicinity of present-day San Miguel.[19]

Historical accounts disagree about the boundary between Northern Chumash and Salinan languages along the northern coast of the county. Mission registers and later ethnographic records leave the locations and linguistic affiliations of many villages uncertain.[20]

The Yak titʸu titʸu yak tiłhini Northern Chumash Tribe and the Salinan Tribe continue cultural preservation work in the region.[21][22]

Spanish missions and Mexican ranchos

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Junípero Serra founded Mission San Luis Obispo de Tolosa on September 1, 1772.[23] Mission San Miguel Arcángel followed on July 25, 1797, founded by Fermín Lasuén.[19] Spanish missions depended on Indigenous agricultural and ranching labor. Introduced diseases reduced Chumash populations, while livestock grazing depleted traditional plant foods and colonial authorities suppressed Indigenous burning. In 1803, the viceroy of New Spain ordered baptized Indigenous people to leave their villages and reside at the missions.[24]

Mexican secularization began in 1834. Regulations provided for distributing land and livestock to Indigenous mission residents, but much of the property instead passed into private ranchos. In 1839, Indigenous residents of Mission San Luis Obispo sought to retain Corral de Piedra, where they kept cattle. Governor Juan Bautista Alvarado granted the ranch and its cattle to José María Villavicencio in 1840.[25] Rancho San Miguelito, granted to Miguel Ávila in 1842, included the future Diablo Canyon site.[26]

Between 1837 and 1843, some Salinan, Northern Chumash, and Yokuts families remained near the former missions, while others became ranch workers. In 1844, Governor Manuel Micheltorena granted land at Las Gallinas, El Nacimiento, and La Estrella to Indigenous residents of San Miguel. U.S. courts later rejected those grants on the grounds that required improvements had not been made.[27]

County formation and transportation

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Mexico ceded California to the United States under the 1848 Treaty of Guadalupe Hidalgo, which ended the Mexican–American War.[28] San Luis Obispo County was one of California’s original counties, established in 1850.[4]

The federal Land Act of 1851 required holders of Spanish and Mexican land grants to submit claims to a land commission. Claimants bore the costs of litigation and surveys, and confirmation could take decades. Rancho San Miguelito received its U.S. patent in 1877.[29]

Cattle ranching and farming dominated the nineteenth-century economy. The drought of 1862–1864 forced the sale of many cattle ranches and encouraged a shift toward dairying.[30]

Coastal wharves and steamship service connected farms to outside markets. Chinese immigrants worked on railroads, roads, and wharves. Southern Pacific reached San Miguel and Paso Robles in 1886 and San Luis Obispo in 1894; completion of the coastal line in 1901 connected the county by rail to both San Francisco and Los Angeles.[31]

Early twentieth century and World War II

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The California Polytechnic School, now Cal Poly, was established by state legislation in 1901 and opened in 1903, initially teaching agriculture, engineering, and household arts.[32]

Oil storage and shipping developed at Port San Luis as production expanded in the neighboring Santa Maria fields. In 1906, Union Oil connected those fields to a storage facility at the port by pipeline.[33]

William Randolph Hearst and architect Julia Morgan developed Hearst Castle above San Simeon between 1919 and 1947. The estate was given to the state in 1958.[34]

Japanese immigrant farmers cultivated vegetables and flower seeds during the early twentieth century. In 1942, Japanese Americans in the county were forcibly removed to incarceration camps; some returned after the war, while others did not.[35]

Camp San Luis Obispo, established in 1927, expanded during World War II.[36] Camp Roberts began training troops in March 1941.[37]

Postwar growth and environmental disputes

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After World War II, veterans who had trained locally settled in the county, and educational opportunities at Cal Poly attracted others. Housing demand led to the conversion of farmland around existing towns into residential subdivisions.[38]

From the 1970s, agriculture shifted toward wine grapes, vegetables, fruit, and seed crops, while service and professional employment expanded.[39]

Construction of Diablo Canyon Power Plant became a focus of environmental opposition during the 1970s and 1980s, including campaigns by San Luis Obispo Mothers for Peace and the Abalone Alliance.[40] The plant’s two reactors began commercial operation in 1985 and 1986.[41] In 1986, voters approved Measure A, requiring voter approval for onshore facilities serving offshore oil development.[42]

Geography

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According to the U.S. Census Bureau, the county has a total area of 3,616 square miles (9,370 km2), of which 3,301 square miles (8,550 km2) is land and 315 square miles (820 km2) (comprising 8.7%) is water.[2]

The La Panza, Garcia, and Santa Lucia ranges occupy the central portion of the county, and the Caliente Range lies in the southeast. The Santa Lucia Range extends along much of the western county, rising sharply from the coast in the north. The Irish Hills lie between Los Osos and Avila Beach. Caliente Peak reaches 5,106 feet (1,556 m), the county’s highest elevation.[10]

The Salinas River drains the Paso Robles area and flows north into Monterey County.[43] San Luis Obispo Creek passes through the county seat and reaches the Pacific Ocean beside Avila Beach.[44] In the south, the Santa Maria River watershed spans parts of San Luis Obispo and Santa Barbara counties and includes the Cuyama and Sisquoc rivers.[45]

Climate

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The county has a Mediterranean climate, with most rainfall occurring during the cooler part of the year. Conditions range from a cool, damp northern coast to a hot, dry interior, including the Cuyama Valley. The Garcia and Santa Lucia ranges intercept Pacific rain-bearing clouds and separate coastal marine air from the drier interior during much of summer. Summer fog is common along the coast, while inland valleys experience winter fog.[46]

The San Luis Obispo area has a warm-summer Mediterranean climate (Csb) under the Köppen climate classification.[47] For the 1991–2020 climate-normal period, the mean daily maximum temperature in July was 78.0 °F (25.6 °C) at San Luis Obispo County Regional Airport and 93.2 °F (34.0 °C) at Paso Robles Municipal Airport. The January mean daily minimum temperatures at the same stations were 40.6 °F (4.8 °C) and 35.1 °F (1.7 °C), respectively.[48][49]

Adjacent counties

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Areas adjacent to San Luis Obispo County, California

National protected areas

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Marine protected areas

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Elephant seals resting together on a sandy beach
Piedras Blancas State Marine Reserve and Marine Conservation Area, an elephant seal rookery.

Demographics

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The 2020 census counted 282,424 residents. The U.S. Census Bureau estimated 282,367 residents on July 1, 2025.[11] The California Department of Finance estimated the county's population at 279,242 on January 1, 2026.[5]

Historical population
CensusPop.Note%±
1850336—
18601,782430.4%
18704,772167.8%
18809,14291.6%
189016,07275.8%
190016,6373.5%
191019,38316.5%
192021,89312.9%
193029,61335.3%
194033,24612.3%
195051,41754.7%
196081,04457.6%
1970105,69030.4%
1980155,43547.1%
1990217,16239.7%
2000246,68113.6%
2010269,6379.3%
2020282,4244.7%
2025 (est.)282,367[56] Decrease0.0%
U.S. Decennial Census[57]
1790–1960[58] 1900–1990[59]
1990–2000[60] 2010[61] 2020[62]

2020 census

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As of the 2020 census, the county had a population of 282,424. The median age was 41.4 years. 17.9% of residents were under the age of 18 and 21.7% of residents were 65 years of age or older. For every 100 females there were 98.7 males, and for every 100 females age 18 and over there were 97.2 males age 18 and over.[63][64]

The racial makeup of the county was 70.2% White, 1.6% Black or African American, 1.1% American Indian and Alaska Native, 3.7% Asian, 0.1% Native Hawaiian and Pacific Islander, 9.7% from some other race, and 13.5% from two or more races. Hispanic or Latino residents of any race comprised 24.0% of the population.[64]

80.9% of residents lived in urban areas, while 19.1% lived in rural areas.[65]

There were 107,797 households in the county, of which 25.7% had children under the age of 18 living with them and 26.6% had a female householder with no spouse or partner present. About 26.6% of all households were made up of individuals and 13.2% had someone living alone who was 65 years of age or older.[63]

There were 123,715 housing units, of which 12.9% were vacant. Among occupied housing units, 61.5% were owner-occupied and 38.5% were renter-occupied. The homeowner vacancy rate was 1.3% and the rental vacancy rate was 4.6%.[63]

Racial and ethnic composition

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San Luis Obispo County, California – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
Race / Ethnicity (NH = Non-Hispanic) Pop 1980[66] Pop 1990[67] Pop 2000[68] Pop 2010[61] Pop 2020[62] % 1980 % 1990 % 2000 % 2010 % 2020
White alone (NH) 132,809 176,246 187,840 191,696 183,468 85.44% 81.16% 76.15% 71.09% 64.96%
Black or African American alone (NH) 2,649 4,325 4,743 5,128 4,330 1.70% 1.99% 1.92% 1.90% 1.53%
Native American or Alaska Native alone (NH) 1,786 1,652 1,490 1,367 1,136 1.15% 0.76% 0.60% 0.51% 0.40%
Asian alone (NH) 3,204 5,774 6,342 8,106 10,001 2.06% 2.66% 2.57% 3.01% 3.54%
Native Hawaiian or Pacific Islander alone (NH) x [69] x [70] 227 346 340 0.09% 0.13% 0.09% 0.13% 0.12%
Other race alone (NH) 195 242 365 784 1,614 0.13% 0.11% 0.15% 0.29% 0.57%
Mixed race or Multiracial (NH) x [note 1][71] x [note 1] 5,478 6,237 13,614 x x 2.22% 2.31% 4.82%
Hispanic or Latino (any race) 14,792 28,923 40,196 55,973 67,921 9.52% 13.32% 16.29% 20.76% 24.05%
Total 155,435 217,162 246,681 269,637 282,424 100.00% 100.00% 100.00% 100.00% 100.00%

2010 census

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The 2010 United States census reported that San Luis Obispo County had a population of 269,637. The racial makeup of San Luis Obispo County was 222,756 (82.6%) White, 5,550 (2.1%) African American, 2,536 (0.9%) Native American, 8,507 (3.2%) Asian (1.0% Filipino, 0.6% Chinese, 0.4% Japanese, 0.3% Indian, 0.3% Korean, 0.2% Vietnamese), 389 (0.1%) Pacific Islander, 19,786 (7.3%) from other races, and 10,113 (3.8%) from two or more races. Hispanic or Latino of any race were 55,973 persons (20.8%); 17.7% of San Luis Obispo County is Mexican, 0.3% Puerto Rican, and 0.2% Salvadoran.[72]

2000 census

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As of the census[73] of 2000, there were 246,681 residents, 92,739 households, and 58,611 families in the county. The population density was 75 people per square mile (29 people/km2). There were 102,275 housing units at an average density of 31 units per square mile (12 units/km2). The racial makeup of the county was 84.6% White, 2.0% Black or African American, 1.0% Native American, 2.7% Asian, 0.1% Pacific Islander, 6.2% from other races, and 3.4% from two or more races. 16.3% of the population were Hispanic or Latino of any race. 13.9% were of German, 11.4% English, 9.7% Irish, 6.1% American and 5.7% Italian ancestry according to Census 2000. 85.7% spoke English and 10.7% Spanish as their first language.

There were 92,739 households, out of which 28.2% had children under the age of 18 living with them, 50.40% were married couples living together, 9.1% had a female householder with no husband present, and 36.8% were non-families. 26.0% of all households were made up of individuals, and 10.3% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.01.

In the county, the population was spread out, with 21.7% under the age of 18, 13.6% from 18 to 24, 27.0% from 25 to 44, 23.3% from 45 to 64, and 14.5% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 105.6 males. For every 100 females age 18 and over, there were 105.2 males.

The median income for a household in the county was $42,428, and the median income for a family was $52,447. Males had a median income of $40,726 versus $27,450 for females. The per capita income for the county was $21,864. About 6.8% of families and 12.8% of the population were below the poverty line, including 11.4% of those under age 18 and 5.9% of those age 65 or over.

Economy

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The county’s gross domestic product was $24.505 billion in 2024.[12] Preliminary Employment Development Department estimates counted 125,400 jobs in August 2026. Service-providing industries accounted for 103,400, including 23,100 government jobs, 21,100 in leisure and hospitality, and 20,300 in private education and health services. Manufacturing accounted for 8,100 jobs and farming for 5,300. These monthly estimates are not seasonally adjusted.[74]

Agriculture and wine

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Strawberries and wine grapes were the county’s first- and second-largest agricultural crops by value in 2024.[75] The county contains the Paso Robles, Edna Valley, Arroyo Grande Valley, and San Luis Obispo Coast viticultural areas; Edna Valley and Arroyo Grande Valley lie within the San Luis Obispo Coast area.[76]

In 2025, San Luis Obispo County had 15,273 acres planted with Cabernet Sauvignon, the second-largest acreage among California counties after Napa County.[77]

The county led the state in hemp cultivation in 2018 as hundreds of acres of the crop were grown in research partnerships.[78] In 2019, nine agricultural research permits were still active. Sixteen commercial permits were issued before a temporary ban on new applications running through June 2020 was passed by the Board of Supervisors.[79]


Income and housing

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The following indicators are five-year American Community Survey estimates for 2020–2024. The separate 2019–2023 survey estimated the county’s poverty rate at 12.8% and its household-income Gini index at 0.4740, compared with 12.0% and 0.4887 statewide.[80]

Economic and housing indicators, 2020–2024
Indicator San Luis Obispo County[11] California[81]
Median household income (2024 dollars)$97,446$99,122
Owner-occupied housing rate62.1%55.9%
Adults aged 25 and older with a bachelor’s degree or higher39.8%37.1%
Median value of owner-occupied housing units$824,700$734,700

Tourism

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Visit California’s economic impact report estimated $2.37 billion in direct travel spending in the county in 2025 and 24,580 tourism-supported jobs.[82] Hearst Castle offers tours of the former Hearst estate in San Simeon. Coastal recreation includes beaches, camping, hiking, and wildlife viewing in state parks around San Simeon, Morro Bay, and Pismo Beach.[83]

Energy

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Pacific Gas and Electric Company operates Diablo Canyon Power Plant.[41] In December 2023, the California Public Utilities Commission approved continued operation through 2030, extending the previous closure schedule.[84] Separately, the Nuclear Regulatory Commission renewed the federal operating licenses in April 2026, with expiration dates of November 2, 2044, for Unit 1 and August 26, 2045, for Unit 2.[85]

Media

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The San Luis Obispo Pioneer was the first newspaper published in San Luis Obispo County between January 4, 1868, and December 1869. It was a weekly, owned and edited by Rome G. Vickers.[86] Vickers began the newspaper by announcing that it would be nonpartisan, but in the 1868 presidential election, he endorsed the Democratic Party ticket headed by Horatio Seymour, thus losing support from Republicans and paving the way for the successful launch in 1869 of the San Luis Obispo Tribune, which is still being published.[86] Vickers, whom a contemporary article described as coming from New Orleans, Louisiana, although no documentation of his residence there has been found, was 26 years old when he began the four-page Pioneer. David Middlecamp described the newspaper as racist in tone and Vickers' writing was "often reactive, mean, poorly sourced and boastful." After the paper folded, Vickers worked in printing and reporting in San Diego, Los Angeles and the San Francisco Bay Area.[86] The Pioneer did, however, publish the first newspaper extra in the county's history, concerning the destruction of the coastal steamer Sierra Nevada, which ran ashore north of Piedras Blancas, California, in 1869.[86]

Government, politics, and policing

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Government

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The government of San Luis Obispo County is defined and authorized under the California Constitution and law as a general-law county.[4] The county government provides countywide services such as elections and voter registration, jails, vital records, property records, tax collection, public health, and social services. In addition, the county is the local government for all unincorporated areas.[4]


Law enforcement

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The San Luis Obispo County Sheriff’s Office provides law enforcement in unincorporated areas.[87] It operates the county jail, serves civil process, and provides bailiff services to the courts.[88] Its patrol stations are in Oceano, Templeton, and Los Osos.[89]

The county’s seven incorporated cities have separate reporting agencies in the Department of Justice’s crime dataset.[90] The California Highway Patrol’s San Luis Obispo Area covers portions of US 101 and State Route 1 and unincorporated communities including Nipomo, Oceano, Cayucos, and Los Osos.[91]

Voter registration

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Cities by population and voter registration

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Overview

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In the 2024 presidential election, Kamala Harris received 81,314 votes in the county and Donald Trump received 64,932.[94]

United States presidential election results for San Luis Obispo County, California[95][96][97][98][94]
Year Republican Democratic Third party(ies)
No. %No. %No. %
1880 830 47.81% 729 41.99% 177 10.20%
1884 1,233 51.44% 1,069 44.60% 95 3.96%
1888 1,689 49.68% 1,585 46.62% 126 3.71%
1892 1,433 38.10% 1,199 31.88% 1,129 30.02%
1896 1,671 43.74% 2,056 53.82% 93 2.43%
1900 1,564 45.81% 1,713 50.18% 137 4.01%
1904 2,015 54.95% 1,167 31.82% 485 13.23%
1908 2,008 50.76% 1,381 34.91% 567 14.33%
1912 13 0.23% 2,248 40.48% 3,292 59.28%
1916 2,854 40.20% 3,539 49.85% 706 9.95%
1920 4,123 61.31% 1,606 23.88% 996 14.81%
1924 3,804 49.01% 731 9.42% 3,226 41.57%
1928 5,425 60.82% 3,336 37.40% 159 1.78%
1932 3,449 28.59% 7,933 65.77% 680 5.64%
1936 4,812 37.28% 7,889 61.13% 205 1.59%
1940 7,204 45.25% 8,499 53.39% 217 1.36%
1944 7,793 48.90% 8,068 50.63% 75 0.47%
1948 10,325 53.49% 8,135 42.14% 844 4.37%
1952 17,716 65.37% 9,174 33.85% 213 0.79%
1956 16,223 58.47% 11,407 41.11% 118 0.43%
1960 17,862 54.04% 14,975 45.30% 218 0.66%
1964 14,906 40.08% 22,252 59.84% 28 0.08%
1968 19,420 51.27% 15,828 41.78% 2,633 6.95%
1972 28,566 55.98% 20,779 40.72% 1,688 3.31%
1976 27,785 51.17% 24,926 45.91% 1,587 2.92%
1980 38,631 55.56% 20,508 29.50% 10,388 14.94%
1984 49,035 63.72% 26,946 35.02% 969 1.26%
1988 46,613 55.85% 35,667 42.73% 1,187 1.42%
1992 36,384 34.78% 40,136 38.36% 28,099 26.86%
1996 46,733 46.50% 40,395 40.19% 13,372 13.31%
2000 56,859 52.22% 44,526 40.89% 7,501 6.89%
2004 67,995 52.69% 58,742 45.52% 2,313 1.79%
2008 61,055 46.03% 68,176 51.39% 3,422 2.58%
2012 59,967 47.73% 61,258 48.76% 4,413 3.51%
2016 56,164 41.60% 67,107 49.71% 11,738 8.69%
2020 67,436 42.22% 88,310 55.29% 3,968 2.48%
2024 64,932 43.05% 81,314 53.92% 4,566 3.03%

The county is divided between California's 24th congressional district, represented by Democrat Salud Carbajal and California's 19th congressional district, represented by Democrat Jimmy Panetta, which includes northern San Luis Obispo County.[14][15]

The county is represented in the California State Senate by the 17th senatorial district, represented by Democrat John Laird and the 21st senatorial district, represented by Democrat Monique Limón, and in the California State Assembly by the 30th Assembly district, represented by Democrat Dawn Addis and the 37th Assembly district, represented by Democrat Gregg Hart.[99]

In April 2008, the California Secretary of State reported that there were 147,326 registered voters in San Luis Obispo County. Of those voters, 61,226 (41.6%) were registered Republicans, 52,586 (35.7%) were registered Democratic, 8,030 (5.4%) were registered with other political parties, and 25,484 (17.3%) declined to state a political preference. The cities of Grover Beach, Morro Bay, and San Luis Obispo had pluralities or majorities of registered Democratic voters, whereas the other incorporated cities and the unincorporated area had Republican pluralities.[100]

Crime

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The following tables show offenses reported to the California Department of Justice in 2025.[90]

Reported offenses in San Luis Obispo County, 2025[note 3]
Offense Number reported Rate per 1,000 residents[note 4]
Population (January 1, 2025)[101] 279,666
Violent crime 8372.99
Homicide 40.01
Rape 1540.55
Robbery 580.21
Aggravated assault 6212.22
Property crime[note 5][102] 2,91810.43
Burglary 3861.38
Larceny-theft 2,2568.07
Motor vehicle theft 2760.99
Arson 310.11

Cities by population and crime rates

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City police department reports, 2025[note 6]
City Population (January 1, 2025)[101] Violent crimes[90] Violent crime rate per 1,000 residents[note 4] Property crimes[90] Property crime rate per 1,000 residents[note 4]
Arroyo Grande 17,922231.281035.75
Atascadero 30,223421.392137.05
Grover Beach 12,541251.99826.54
Morro Bay 10,379201.9310610.21
Paso Robles 31,1511103.5348715.63
Pismo Beach 7,836303.8313817.61
San Luis Obispo 49,8491753.511,03220.70

Fire protection

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San Luis Obispo County Fire Department
Agency overview
Employees121 full-time CAL FIRE positions (FY 2026–27 recommended)[103]
Annual budget$41.8 million (FY 2026–27 recommended)[103]
Fire chiefJohn Owens[103]
Facilities and equipment
Battalions7 (joint CAL FIRE/county organization)[104]
Airport crash2 at Airport Station 21[105]
Website
Official website

In unincorporated parts of the county, fire protection and emergency response services have been provided by the San Luis Obispo County Fire Department, through a cooperative agreement with CAL FIRE, since 1930.[106] The county fire department also serves Los Osos and Avila Beach.[106] In Oceano, the county contracts with the Five Cities Fire Authority for fire protection.[107] The city of San Luis Obispo is served by the San Luis Obispo City Fire Department.[108]

The county’s recommended fire budget for fiscal year 2026–27 provides for 121 full-time CAL FIRE contract positions.[103] The department and CAL FIRE reorganized their battalion boundaries on July 1, 2025. The South Coast Battalion covers Nipomo and the Mesa area, while the San Luis Obispo Battalion covers San Luis Obispo and surrounding areas.[109] Airport Station 21 provides aircraft rescue and firefighting as well as service to Edna Valley and surrounding rural areas.[105]

The 2026 unit fire plan identified 17 agencies operating 48 fire stations throughout the county. An automatic mutual aid system dispatches the closest engine regardless of jurisdiction.[110]

Specialized county fire resources include a rescue vehicle and water tender at Airport Station 21,[105] the HazMat 1 hazardous-materials response unit at Meridian Station 52,[111] and a regional breathing-air and lighting unit at Avila Station 62.[112] Heritage Ranch Station 33 operates a wildland engine and a fire-rescue boat for Lake Nacimiento.[113]

Transportation

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Major highways

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Public transportation

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Amtrak’s Pacific Surfliner connects San Luis Obispo and Grover Beach with Los Angeles and San Diego.[114] The Coast Starlight serves San Luis Obispo and Paso Robles on its Los Angeles–Seattle route.[115] The San Luis Obispo Regional Transit Authority provides countywide service along US 101 as well as service to Morro Bay, Los Osos, Cambria and San Simeon.[116]

Local services include SLO Transit in San Luis Obispo,[117] Dial-A-Ride in Atascadero,[118] and routes A and B in Paso Robles, operated by the Regional Transit Authority.[119] Passengers can transfer between RTA and SLO Transit at the San Luis Obispo Government Center.[120]

Aerial view of the airport runway and surrounding coastal development
Oceano County Airport in 2013

Intercity bus connections are available through the Greyhound and FlixBus network.[121]

Gold Runner’s Route 18 provides seasonal bus service between Hanford and San Luis Obispo, including a stop at Cal Poly, on selected dates tied to the university’s academic calendar. The seasonal service began on August 22, 2026.[122]

FlixBus boards from the San Luis Obispo Railroad Museum at 1940 Santa Barbara Avenue.[123]

Airports

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The county has three publicly owned airports. The county owns San Luis Obispo County Regional Airport and Oceano County Airport; the City of Paso Robles owns Paso Robles Municipal Airport.[124]

  • San Luis Obispo County Regional Airport (SBP) is located just south of the city of San Luis Obispo. Scheduled passenger flights are operated by Alaska Airlines, American Airlines, and United Airlines.[125] The airport recorded 811,905 arriving and departing airline passengers in 2025.[126]
  • Paso Robles Municipal Airport (PRB) is located northeast of the city of Paso Robles and is home to California Highway Patrol and CAL FIRE[127] and the Estrella Warbirds Museum.[128] The city-owned airport covers 1,300 acres and serves general aviation, charter, military, and air ambulance flights. It has no scheduled airline service.[127]
  • Oceano County Airport (L52) is located on the coast in the Five Cities area.[129] The county-owned facility serves general aviation.[124] It lies between Pismo State Beach, the Union Pacific Railroad, and Pismo Dunes Natural Preserve.[129]

Highway improvements and historical proposals

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A 1970 federal highway report listed a proposed addition to the Interstate Highway System between Buttonwillow and Barstow via Bakersfield.[130]

Caltrans is widening the SR 46 corridor between US 101 and Interstate 5 to a four-lane divided expressway. The Cholame section was completed in 2025.[131] A grade-separated interchange at the SR 41/46 junction opened in June 2025.[132] The planned Antelope Grade section would connect the four-lane sections in San Luis Obispo and Kern counties.[131]

Education

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Primary and secondary education

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The San Luis Obispo County Office of Education provides alternative education and special education services throughout the county.[133]

The 2020 Census identified the following school districts as serving parts of the county:

K–12 unified:[134]

Elementary:[134]

Higher education

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Cal Poly, founded in 1901, had 23,245 students at its San Luis Obispo campus in fall 2025.[32][136]

Cuesta College, established in 1963, serves the San Luis Obispo County Community College District. It has its main campus in San Luis Obispo, a North County Campus in Paso Robles, and a South County Center in Arroyo Grande. The college offers associate degrees, certificates, university-transfer courses, career technical education, and continuing education.[137]

Laurus College offers online programs with on-site support in San Luis Obispo and Atascadero.[138]

Communities

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Cities

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The county has seven incorporated cities.[5]

Unincorporated communities

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Two bat stars
Pair of bat stars near Los Osos

Community populations

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The following table lists selected incorporated cities and census-designated places and their 2020 census populations.[139]

† county seat

Selected community populations, 2020 census
Community Type Population
Arroyo Grande City 18,441
Atascadero City 29,773
Avila Beach CDP 1,576
Blacklake CDP 1,016
Callender CDP 1,282
Cambria CDP 5,678
Cayucos CDP 2,505
Creston CDP 98
Edna CDP 184
Garden Farms CDP 449
Grover Beach City 12,701
Lake Nacimiento CDP 2,956
Los Berros CDP 623
Los Osos CDP 14,465
Los Ranchos CDP 1,516
Morro Bay City 10,757
Nipomo CDP 18,176
Oak Shores CDP 316
Oceano CDP 7,183
Paso Robles (El Paso de Robles) City 31,490
Pismo Beach City 8,072
† San Luis Obispo City 47,063
San Miguel CDP 3,172
San Simeon CDP 445
Santa Margarita CDP 1,291
Shandon CDP 1,168
Templeton CDP 8,386
Whitley Gardens CDP 325
Woodlands CDP 1,933

See also

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Notes

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  1. 1 2 The census first allowed respondents to identify with more than one race in 2000.
  2. 1 2 Registered voters as of September 4, 2026, divided by estimated total population on January 1, 2026. Party percentages use registered voters as the denominator. Democratic–Republican spreads are in percentage points. The city tables combine minor parties, unknown registrations and other registrations in the Other column.
  3. ↑ County counts are sums of the 16 reporting-agency records assigned to San Luis Obispo County in the Department of Justice dataset, including city, sheriff, campus, state, and railroad agencies.
  4. 1 2 3 Rates are calculated as reported offenses divided by the January 1, 2025 population estimate, multiplied by 1,000, and rounded to two decimal places.
  5. ↑ Property crime includes all reported larceny-theft, along with burglary and motor vehicle theft. The Department of Justice adopted the expanded definition of rape in 2014, so the rape figures are not directly comparable with the former forcible-rape category.
  6. ↑ City figures are those reported by the named city’s police department; they exclude separately reporting agencies, such as campus police. They do not add up to the county totals.
  7. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 For statistical purposes, defined by the United States Census Bureau as a census-designated place (CDP).

References

edit
  1. ↑ "County Starts New Year with New Look". County of San Luis Obispo. January 6, 2017. Retrieved October 2, 2026.
  2. 1 2 3 4 5 "2020 Gazetteer Files: Counties in California". United States Census Bureau. 2020. San Luis Obispo County, GEOID 06079. Archived from the original on August 21, 2026. Retrieved October 2, 2026.
  3. ↑ "Chronology". California State Association of Counties. Archived from the original on January 29, 2016. Retrieved February 6, 2015.
  4. 1 2 3 4 5 6 "About the County". County of San Luis Obispo. Retrieved October 2, 2026.
  5. 1 2 3 4 5 6 "E-1 Population Estimates for Cities, Counties and the State with Annual Percent Change: January 1, 2025 and 2026" (XLSX). California Department of Finance. May 2026. E-1 CityCounty2026 worksheet, San Luis Obispo County and city rows. Retrieved October 2, 2026.
  6. ↑ "2020 Gazetteer Files: Places in California". United States Census Bureau. 2020. Seven incorporated city records in San Luis Obispo County. Retrieved October 2, 2026.
  7. 1 2 3 "Board of Supervisors - County of San Luis Obispo". Retrieved October 2, 2026.
  8. 1 2 "Proposed Budget 2026–27: Board Governed Special Districts". County of San Luis Obispo. Board of Supervisors roster (unnumbered front matter). Retrieved October 2, 2026.
  9. ↑ "Executive Office: 2026". County of San Luis Obispo. Retrieved October 2, 2026.
  10. 1 2 Unit Strategic Fire Plan: CAL FIRE/San Luis Obispo County Fire Department, 2026 (PDF) (Report). California Department of Forestry and Fire Protection. May 7, 2026. p. 16. Retrieved October 2, 2026.
  11. 1 2 3 4 5 "QuickFacts: San Luis Obispo County, California". United States Census Bureau. Retrieved October 2, 2026.
  12. 1 2 U.S. Bureau of Economic Analysis (February 5, 2026). "Gross Domestic Product: All Industries in San Luis Obispo County, CA (GDPALL06079)". Federal Reserve Bank of St. Louis. Retrieved October 2, 2026.
  13. ↑ "CPUC Offers Reminder That 805 Area Code Requires Dialing 1 + Area Code + Telephone Number for All Calls Beginning June 2, 2018" (PDF) (Press release). California Public Utilities Commission. April 19, 2018. p. 2. Retrieved October 2, 2026.
  14. 1 2 "About". Office of Representative Jimmy Panetta. Retrieved October 2, 2026.
  15. 1 2 "California's 24th District". Office of Representative Salud Carbajal. Retrieved October 2, 2026.
  16. ↑ Jones, Terry L.; Gobalet, Kenneth W.; Mikkelsen, Patricia; Hadick, Kacey; Hildebrandt, William R.; Jones, Deborah A. (2016). "Prehistoric Fisheries of Morro Bay, San Luis Obispo County, California" (PDF). Journal of California and Great Basin Anthropology. 36 (1): 119, 123–124. Retrieved October 2, 2026.
  17. ↑ "Morro Bay State Marine Reserve/State Marine Recreational Management Area". California Department of Fish and Wildlife. Retrieved October 2, 2026.
  18. ↑ "Los Osos Oaks State Natural Reserve". California Department of Parks and Recreation. Retrieved October 2, 2026.
  19. 1 2 "Mission San Miguel Arcángel". California Office of Historic Preservation. Retrieved October 2, 2026.
  20. ↑ Milliken, Randall; Johnson, John R. (March 2005). An Ethnogeography of Salinan and Northern Chumash Communities – 1769 to 1810 (Report). Far Western Anthropological Research Group. p. i. Retrieved October 2, 2026.
  21. ↑ "Living history". Yak titʸu titʸu yak tiłhini Northern Chumash Tribe. Retrieved October 2, 2026.
  22. ↑ "Salinan Tribe of Monterey and San Luis Obispo Counties". Salinan Tribe. Retrieved October 2, 2026.
  23. ↑ "Visit Mission San Luis Obispo de Tolosa". Mission San Luis Obispo de Tolosa. Retrieved October 2, 2026.
  24. ↑ Dartt-Newton, Deana; Erlandson, Jon M. (2006). "Little Choice for the Chumash: Colonialism, Cattle, and Coercion in Mission Period California" (PDF). American Indian Quarterly. 30 (3–4): 420–423. doi:10.1353/aiq.2006.0020. JSTOR 4139021. Retrieved October 2, 2026.
  25. ↑ Ryan, MaryEllen; Breschini, Gary S. "Secularization and the Ranchos, 1826–1846". Monterey County Historical Society. Retrieved October 2, 2026.
  26. ↑ Historic Built Environment Evaluation Report–Revised: Diablo Canyon Power Plant Decommissioning Project (Report). Page & Turnbull. April 14, 2022. pp. 29–30. Retrieved October 2, 2026.
  27. ↑ Milliken, Randall; Johnson, John R. (March 2005). An Ethnogeography of Salinan and Northern Chumash Communities – 1769 to 1810 (Report). Far Western Anthropological Research Group. pp. 34, 36. Retrieved October 2, 2026.
  28. ↑ "Treaty of Guadalupe Hidalgo (1848)". National Archives and Records Administration. Retrieved October 2, 2026.
  29. ↑ Perez, Cris (1982). Grants of Land in California Made by Spanish or Mexican Authorities (PDF) (Report). California State Lands Commission. pp. 3–5, 111. Retrieved October 2, 2026.
  30. ↑ Historic Built Environment Evaluation Report–Revised: Diablo Canyon Power Plant Decommissioning Project (Report). Page & Turnbull. April 14, 2022. p. 30. Retrieved October 2, 2026.
  31. ↑ Nevarez, Leonard; Molotch, Harvey; Freudenburg, William (eds.). San Luis Obispo County: A Major Switching (PDF) (Report). U.S. Department of the Interior, Minerals Management Service. pp. 7–8. OCS Study MMS 96-0037. Archived (PDF) from the original on July 17, 2026. Retrieved October 2, 2026.
  32. 1 2 "125 Years of Learn by Doing". California Polytechnic State University. Spring 2026. Timeline, 1901 and 1903. Retrieved October 2, 2026.
  33. ↑ Nevarez, Leonard; Molotch, Harvey; Freudenburg, William (eds.). San Luis Obispo County: A Major Switching (PDF) (Report). U.S. Department of the Interior, Minerals Management Service. p. 10. OCS Study MMS 96-0037. Archived (PDF) from the original on July 17, 2026. Retrieved October 2, 2026.
  34. ↑ "California State Parks Refills Hearst Castle's Neptune Pool" (Press release). California Department of Parks and Recreation. August 14, 2018. Retrieved October 2, 2026.
  35. ↑ Historic Built Environment Evaluation Report–Revised: Diablo Canyon Power Plant Decommissioning Project (Report). Page & Turnbull. April 14, 2022. pp. 32–33. Retrieved October 2, 2026.
  36. ↑ Historic Built Environment Evaluation Report–Revised: Diablo Canyon Power Plant Decommissioning Project (Report). Page & Turnbull. April 14, 2022. pp. 32–33. Retrieved October 2, 2026.
  37. ↑ "History of the Base". Camp Roberts Historical Museum. Retrieved October 2, 2026.
  38. ↑ Historic Built Environment Evaluation Report–Revised: Diablo Canyon Power Plant Decommissioning Project (Report). Page & Turnbull. April 14, 2022. p. 33. Retrieved October 2, 2026.
  39. ↑ Nevarez, Leonard; Molotch, Harvey; Freudenburg, William (eds.). San Luis Obispo County: A Major Switching (PDF) (Report). U.S. Department of the Interior, Minerals Management Service. p. 47. OCS Study MMS 96-0037. Archived (PDF) from the original on July 17, 2026. Retrieved October 2, 2026.
  40. ↑ Nevarez, Leonard; Molotch, Harvey; Freudenburg, William (eds.). San Luis Obispo County: A Major Switching (PDF) (Report). U.S. Department of the Interior, Minerals Management Service. pp. 65–66. OCS Study MMS 96-0037. Archived (PDF) from the original on July 17, 2026. Retrieved October 2, 2026.
  41. 1 2 "California Nuclear Profile 2010". U.S. Energy Information Administration. April 26, 2012. Plants in State: Diablo Canyon Nuclear Plant. Retrieved October 2, 2026.
  42. ↑ Nevarez, Leonard; Molotch, Harvey; Freudenburg, William (eds.). San Luis Obispo County: A Major Switching (PDF) (Report). U.S. Department of the Interior, Minerals Management Service. pp. 87–88. OCS Study MMS 96-0037. Archived (PDF) from the original on July 17, 2026. Retrieved October 2, 2026.
  43. ↑ Lower Salinas–Paso Robles Area Watershed (Report). County of San Luis Obispo. Description, first PDF page. Retrieved October 2, 2026.
  44. ↑ San Luis Obispo Creek Watershed (Report). County of San Luis Obispo. p. 369. Retrieved October 2, 2026.
  45. ↑ Santa Maria River Watershed (Report). County of San Luis Obispo. p. 353. Retrieved October 2, 2026.
  46. ↑ Unit Strategic Fire Plan: CAL FIRE/San Luis Obispo County Fire Department, 2026 (PDF) (Report). California Department of Forestry and Fire Protection. May 7, 2026. pp. 13–14. Retrieved October 2, 2026.
  47. ↑ Ryan, Gary (February 1994). Climate of San Luis Obispo, California (PDF) (Report). National Weather Service. p. 2. NOAA Technical Memorandum NWS WR-223. Retrieved October 2, 2026.
  48. ↑ "1991–2020 Monthly Normals: San Luis Obispo Airport, CA US". National Centers for Environmental Information. January and July rows, MLY-TMIN-NORMAL and MLY-TMAX-NORMAL. Retrieved October 2, 2026.
  49. ↑ "1991–2020 Monthly Normals: Paso Robles Municipal Airport, CA US". National Centers for Environmental Information. January and July rows, MLY-TMIN-NORMAL and MLY-TMAX-NORMAL. Retrieved October 2, 2026.
  50. ↑ "S. 1423: Central Coast Heritage Protection Act". U.S. Department of the Interior. April 21, 2016. Background. Retrieved October 2, 2026.
  51. ↑ Guadalupe-Nipomo Dunes National Wildlife Refuge Comprehensive Conservation Plan: Appendices A–D (PDF) (Report). U.S. Fish and Wildlife Service. p. B-1. Retrieved October 2, 2026.
  52. ↑ "About the Area". United States Forest Service. Retrieved October 2, 2026.
  53. 1 2 3 4 5 "MPA Outreach Materials". California Department of Fish and Wildlife. MPAs by County: San Luis Obispo County. Retrieved October 2, 2026.
  54. ↑ "Chumash Heritage National Marine Sanctuary". National Oceanic and Atmospheric Administration. Retrieved October 2, 2026.
  55. ↑ "Regulations and Boundaries". National Oceanic and Atmospheric Administration. Sanctuary Boundaries. Retrieved October 2, 2026.
  56. ↑ "Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2025". United States Census Bureau. Retrieved April 10, 2026.
  57. ↑ "Census of Population and Housing from 1790-2000". US Census Bureau. Retrieved January 24, 2022.
  58. ↑ "Historical Census Browser". University of Virginia Library. Retrieved October 4, 2015.
  59. ↑ Forstall, Richard L., ed. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved October 4, 2015.
  60. ↑ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Retrieved October 4, 2015.
  61. 1 2 "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – San Luis Obispo County, California". United States Census Bureau.
  62. 1 2 "P2: Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – San Luis Obispo County, California". United States Census Bureau.
  63. 1 2 3 "2020 Decennial Census Demographic Profile (DP1)". United States Census Bureau. 2021. Archived from the original on January 7, 2026. Retrieved December 22, 2025.
  64. 1 2 "2020 Decennial Census Redistricting Data (Public Law 94-171)". United States Census Bureau. 2021. Archived from the original on January 7, 2026. Retrieved December 22, 2025.
  65. ↑ "2020 Decennial Census Demographic and Housing Characteristics (DHC)". United States Census Bureau. 2023. Archived from the original on January 7, 2026. Retrieved December 22, 2025.
  66. ↑ "California: 1980, General Social and Economic Characteristics, Part 1 - Table 59: Persons by Race, Hispanic Origin, and Sex" (PDF). United States Census Bureau.
  67. ↑ "California: 1990, Part 1 - Table 5: Race and Hispanic Origin" (PDF). United States Census Bureau. Retrieved July 14, 2024.
  68. ↑ "P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – San Luis Obispo County, California". United States Census Bureau.
  69. ↑ included in the Asian category in the 1980 Census
  70. ↑ included in the Asian category in the 1990 Census
  71. ↑ "Frequently Asked Questions (FAQs) About Race". United States Census Bureau. Retrieved October 2, 2026.
  72. ↑ "2010 Census P.L. 94-171 Summary File Data". United States Census Bureau.
  73. ↑ "U.S. Census website". United States Census Bureau. Retrieved May 14, 2011.
  74. ↑ San Luis Obispo-Paso Robles Metropolitan Statistical Area (San Luis Obispo County): Industry Employment & Labor Force (PDF) (Report). California Employment Development Department. September 18, 2026. p. 3. Retrieved October 2, 2026.
  75. ↑ "2024 Annual Crop Report". County of San Luis Obispo Department of Agriculture/Weights & Measures. pp. 1, 3. Retrieved October 2, 2026.
  76. ↑ "Established AVAs". Alcohol and Tobacco Tax and Trade Bureau. California AVAs: San Luis Obispo County. Retrieved October 2, 2026.
  77. ↑ California Grape Acreage Report, 2025 (PDF) (Report). United States Department of Agriculture, National Agricultural Statistics Service. April 22, 2026. pp. 26–27. Retrieved October 2, 2026.
  78. ↑ Vaughan, Monica (June 18, 2019). "Hemp could be big money for SLO County farmers. Did politicians scare away investors?". San Luis Obispo Tribune. Retrieved June 24, 2019.
  79. ↑ Wilson, Nick (October 31, 2019). "SLO County hemp harvest is in full swing, but here's why it's not as big as it could be". San Luis Obispo Tribune. Retrieved November 2, 2019.
  80. ↑ San Luis Obispo County Community Needs Assessment 2025 (PDF) (Report). Community Action Partnership of San Luis Obispo County. June 2025. pp. 17, 20. Retrieved October 2, 2026.
  81. ↑ "QuickFacts: California". United States Census Bureau. Retrieved October 2, 2026.
  82. ↑ Alley, Dave (May 4, 2026). "SLO County tourism saw record breaking 7.7 million visitors in 2025". KEYT. Retrieved October 2, 2026.
  83. ↑ "Welcome to Hearst Castle". California State Parks. Retrieved October 2, 2026.
  84. ↑ "California regulators vote to extend Diablo Canyon nuclear plant operations through 2030". Associated Press. December 14, 2023. Retrieved October 2, 2026.
  85. ↑ "NRC Issues 100th Renewed License with Diablo Canyon Approvals" (PDF) (Press release). U.S. Nuclear Regulatory Commission. April 2, 2026. News Release 26-039. Archived (PDF) from the original on April 19, 2026. Retrieved October 2, 2026.
  86. 1 2 3 4 Middlecamp, David (January 5, 2018). "Racist editor launched SLO's first newspaper 150 years ago. It lasted 24 months". The Tribune. Archived from the original on January 6, 2026. Retrieved October 2, 2026.
  87. ↑ "Sheriff-Coroner". County of San Luis Obispo. Retrieved October 2, 2026.
  88. ↑ FY 2026–27 Recommended Budget (Report). County of San Luis Obispo. pp. 237, 239. Retrieved October 2, 2026.
  89. ↑ "Business Hours". County of San Luis Obispo. Retrieved October 2, 2026.
  90. 1 2 3 4 "Crimes and Clearances with Arson, 1985–2025" (CSV). California Department of Justice. July 1, 2026. 2025 records, San Luis Obispo County. Retrieved October 2, 2026.
  91. ↑ "(745) San Luis Obispo". California Highway Patrol. Retrieved October 2, 2026.
  92. ↑ Report of Registration as of September 4, 2026: Registration by County (PDF) (Report). California Secretary of State. September 4, 2026. pp. 9–10. Retrieved October 2, 2026.
  93. ↑ Report of Registration as of September 4, 2026: Registration by Political Subdivision by County (PDF) (Report). California Secretary of State. September 4, 2026. pp. 175–176. Retrieved October 2, 2026.
  94. 1 2 Presidential Summary by County (PDF) (Report). California Secretary of State. 2024. p. 5. Retrieved October 2, 2026.
  95. ↑ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved September 2, 2018.
  96. ↑ Bowen, Debra (December 13, 2008). "United States President by County" (PDF). Secretary of State of California. Archived (PDF) from the original on April 25, 2025. Retrieved October 3, 2025.
  97. ↑ Bowen, Debra (December 14, 2012). "President by County" (PDF). Secretary of State of California. Archived (PDF) from the original on March 24, 2025. Retrieved October 3, 2025.
  98. ↑ Padilla, Alex (December 16, 2016). "President by County" (PDF). Secretary of State of California. Archived (PDF) from the original on August 31, 2025. Retrieved October 3, 2025.
  99. ↑ "Current Officeholders Information". County of San Luis Obispo. State offices. Retrieved October 2, 2026.
  100. ↑ Report of Registration as of April 4, 2008: Registration by Political Subdivision by County (PDF) (Report). California Secretary of State. April 4, 2008. pp. 161–162. Retrieved October 2, 2026.
  101. 1 2 E-1 Population Estimates for Cities, Counties and the State with Annual Percent Change: January 1, 2025 and 2026 (XLSX) (Report). California Department of Finance. May 2026. E-1 CityCounty2026 worksheet, January 1, 2025 column, San Luis Obispo County and city rows. Retrieved October 2, 2026.
  102. ↑ Crimes and Clearances: Data Set Overview and History (PDF) (Report). California Department of Justice, Criminal Justice Statistics Center. June 2026. pp. 2–4, 6. Retrieved October 2, 2026.
  103. 1 2 3 4 "FY 2026–27 Recommended Budget". County of San Luis Obispo. pp. 183, 185–186. Retrieved October 2, 2026.
  104. ↑ Unit Strategic Fire Plan: CAL FIRE/San Luis Obispo County Fire Department, 2026 (PDF) (Report). California Department of Forestry and Fire Protection. May 7, 2026. p. 24. Retrieved October 2, 2026.
  105. 1 2 3 "Station 21 – San Luis Obispo Airport". San Luis Obispo County Fire Department. Retrieved October 2, 2026.
  106. 1 2 "San Luis Obispo County Fire Department". calfireslo.org. Retrieved October 2, 2026.
  107. ↑ "LAFCO Approves Divestiture Plan for Fire Service in Oceano". County of San Luis Obispo. December 19, 2024. Retrieved October 2, 2026.
  108. ↑ Community Wildfire Protection Plan: San Luis Obispo County (PDF) (Report). San Luis Obispo County. July 2019. p. 30. Retrieved October 2, 2026.
  109. ↑ "SLO County Fire Department Announces Historic Battalion Reorganization" (PDF) (Press release). San Luis Obispo County Fire Department. July 12, 2025. Retrieved October 2, 2026.
  110. ↑ Unit Strategic Fire Plan: CAL FIRE/San Luis Obispo County Fire Department, 2026 (PDF) (Report). California Department of Forestry and Fire Protection. May 7, 2026. p. 20. Retrieved October 2, 2026.
  111. ↑ "Station 52 – Meridian". San Luis Obispo County Fire Department. Retrieved October 2, 2026.
  112. ↑ "Station 62 – Avila Valley". San Luis Obispo County Fire Department. Retrieved October 2, 2026.
  113. ↑ "Station 33 – Heritage Ranch". San Luis Obispo County Fire Department. Retrieved October 2, 2026.
  114. ↑ "Pacific Surfliner". Amtrak. Retrieved October 2, 2026.
  115. ↑ "Coast Starlight". Amtrak. Retrieved October 2, 2026.
  116. ↑ "Fixed Route Buses". San Luis Obispo Regional Transit Authority. Retrieved October 2, 2026.
  117. ↑ "Transportation". City of San Luis Obispo. Retrieved October 2, 2026.
  118. ↑ "Public Transit". City of Atascadero. Retrieved October 2, 2026.
  119. ↑ "About RTA". San Luis Obispo Regional Transit Authority. Archived from the original on June 17, 2026. Retrieved October 2, 2026.
  120. ↑ "Route 10 San Luis Obispo to Santa Maria". San Luis Obispo Regional Transit Authority. Retrieved October 2, 2026.
  121. ↑ "Bus from San Luis Obispo, CA". Greyhound. Retrieved October 2, 2026.
  122. ↑ "Route 18". San Joaquin Joint Powers Authority. Retrieved October 2, 2026.
  123. ↑ "Bus stations and stops in San Luis Obispo, CA". FlixBus. Retrieved October 2, 2026.
  124. 1 2 "Airports". San Luis Obispo Council of Governments. Retrieved October 2, 2026.
  125. ↑ "Airline Information". County of San Luis Obispo. Retrieved October 2, 2026.
  126. ↑ Airline Passenger Summary (PDF) (Report). San Luis Obispo County Airport. February 24, 2026. 2025 GRAND TOTAL row. Retrieved October 2, 2026.
  127. 1 2 "Airport Overview". City of Paso Robles. Retrieved October 2, 2026.
  128. ↑ "Estrella Warbirds Museum". Estrella Warbirds Museum. Retrieved October 2, 2026.
  129. 1 2 "L52 Oceano". County of San Luis Obispo. Retrieved October 2, 2026.
  130. ↑ United States Senate Committee on Public Works, Subcommittee on Roads (April 15, 1970). Report on the Status of the Federal-Aid Highway Program. United States Government Printing Office. p. 89. Retrieved October 2, 2026 – via HathiTrust.
  131. 1 2 "State Route 46 Corridor Improvement Project". California Department of Transportation. Retrieved October 2, 2026.
  132. ↑ "Caltrans Announces Designation of Hwy 46 Segment as 'James Dean Memorial Highway', Emphasizing Safety on Historic Corridor". California Department of Transportation. October 1, 2026. Retrieved October 2, 2026.
  133. ↑ "Student Programs and Services". San Luis Obispo County Office of Education. Retrieved October 2, 2026.
  134. 1 2 Geography Division (December 18, 2020). "2020 Census – School District Reference Map: San Luis Obispo County, CA" (PDF). U.S. Census Bureau. Retrieved June 1, 2025. - Text list
  135. ↑ "San Luis Obispo County Office of Education". San Luis Obispo County Office of Education. Districts directory. Retrieved October 2, 2026.
  136. ↑ "Enrollment by Campus – Fall 2025". California State University. Retrieved October 2, 2026.
  137. ↑ "Fast Facts for Cuesta College". Cuesta College. Retrieved October 2, 2026.
  138. ↑ "Locations". Laurus College. Retrieved October 2, 2026.
  139. ↑ "Explore Census Data". United States Census Bureau. Retrieved September 27, 2021.

Further reading

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