Illinois's congressional delegations

Since Illinois became a U.S. state in 1818, it has sent congressional delegations to the United States Senate and United States House of Representatives. Each state elects two senators to serve for six years, and members of the House to two-year terms. Before becoming a state, the Illinois Territory elected a non-voting delegate at-large to Congress from 1812 to 1818.

These are tables of congressional delegations from Illinois to the United States Senate and the United States House of Representatives.

Current delegation

Current U.S. senators from Illinois
Illinois CPVI (2025): D+6	Class II senator	Class III senator
	Dick Durbin (Senior senator) (Springfield)	Tammy Duckworth (Junior senator) (Hoffman Estates)
Party	Democratic	Democratic
Incumbent since	January 3, 1997	January 3, 2017

Illinois's current congressional delegation in the 119th Congress consists of its two senators, both of whom are Democrats, and its 17 representatives: 14 Democrats and 3 Republicans.

The current dean of the Illinois delegation is Senator Dick Durbin, having served in the Senate since 1997 and in Congress since 1983.

Current U.S. representatives from Illinois
District	Member (Residence)	Party	Incumbent since	CPVI (2025)	District map
1st	Jonathan Jackson (Chicago)	Democratic	January 3, 2023	D+18
2nd	Robin Kelly (Matteson)	Democratic	April 11, 2013	D+18
3rd	Delia Ramirez (Chicago)	Democratic	January 3, 2023	D+17
4th	Chuy García (Chicago)	Democratic	January 3, 2019	D+17
5th	Mike Quigley (Chicago)	Democratic	April 7, 2009	D+19
6th	Sean Casten (Downers Grove)	Democratic	January 3, 2019	D+3
7th	Danny Davis (Chicago)	Democratic	January 3, 1997	D+34
8th	Raja Krishnamoorthi (Schaumburg)	Democratic	January 3, 2017	D+5
9th	Jan Schakowsky (Evanston)	Democratic	January 3, 1999	D+19
10th	Brad Schneider (Highland Park)	Democratic	January 3, 2017	D+12
11th	Bill Foster (Naperville)	Democratic	January 3, 2013	D+6
12th	Mike Bost (Murphysboro)	Republican	January 3, 2015	R+22
13th	Nikki Budzinski (Springfield)	Democratic	January 3, 2023	D+5
14th	Lauren Underwood (Naperville)	Democratic	January 3, 2019	D+3
15th	Mary Miller (Oakland)	Republican	January 3, 2021	R+20
16th	Darin LaHood (Peoria)	Republican	September 10, 2015	R+11
17th	Eric Sorensen (Moline)	Democratic	January 3, 2023	D+3

United States Senate

Main article: List of United States senators from Illinois

Class II senator		Congress	Class III senator
Jesse B. Thomas (DR)		15th (1817–1819)		Ninian Edwards (DR)
		16th (1819–1821)
		17th (1821–1823)
		18th (1823–1825)
				John McLean (DR)
Jesse B. Thomas (NR)		19th (1825–1827)		Elias Kane (J)
		20th (1827–1829)
John McLean (J)		21st (1829–1831)
David J. Baker (J)
John M. Robinson (J)
		22nd (1831–1833)
		23rd (1833–1835)
		24th (1835–1837)
				William Lee D. Ewing (J)
John M. Robinson (D)		25th (1837–1839)		Richard M. Young (D)
		26th (1839–1841)
Samuel McRoberts (D)		27th (1841–1843)
		28th (1843–1845)		Sidney Breese (D)
James Semple (D)
		29th (1845–1847)
Stephen A. Douglas (D)		30th (1847–1849)
		31st (1849–1851)		James Shields (D)
		32nd (1851–1853)
		33rd (1853–1855)
		34th (1855–1857)		Lyman Trumbull (D)
		35th (1857–1859)		Lyman Trumbull (R)
		36th (1859–1861)
		37th (1861–1863)
Orville Browning (R)
William A. Richardson (D)
		38th (1863–1865)
Richard Yates (R)		39th (1865–1867)
		40th (1867–1869)
		41st (1869–1871)
John A. Logan (R)		42nd (1871–1873)		Lyman Trumbull (LR)
		43rd (1873–1875)		Richard J. Oglesby (R)
		44th (1875–1877)
David Davis (I)		45th (1877–1879)
		46th (1879–1881)		John A. Logan (R)
		47th (1881–1883)
Shelby M. Cullom (R)		48th (1883–1885)
		49th (1885–1887)
				Charles B. Farwell (R)
		50th (1887–1889)
		51st (1889–1891)
		52nd (1891–1893)		John M. Palmer (D)
		53rd (1893–1895)
		54th (1895–1897)
		55th (1897–1899)		William E. Mason (R)
		56th (1899–1901)
		57th (1901–1903)
		58th (1903–1905)		Albert J. Hopkins (R)
		59th (1905–1907)
		60th (1907–1909)
		61st (1909–1911)		William Lorimer (R)
		62nd (1911–1913)
J. Hamilton Lewis (D)		63rd (1913–1915)		Lawrence Y. Sherman (R)
		64th (1915–1917)
		65th (1917–1919)
Medill McCormick (R)		66th (1919–1921)
		67th (1921–1923)		William B. McKinley (R)
		68th (1923–1925)
Charles S. Deneen (R)
		69th (1925–1927)
				Frank L. Smith (R)
		70th (1927–1929)
				Otis F. Glenn (R)
		71st (1929–1931)
J. Hamilton Lewis (D)		72nd (1931–1933)
		73rd (1933–1935)		William H. Dieterich (D)
		74th (1935–1937)
		75th (1937–1939)
		76th (1939–1941)		Scott W. Lucas (D)
James M. Slattery (D)
C. Wayland Brooks (R)
		77th (1941–1943)
		78th (1943–1945)
		79th (1945–1947)
		80th (1947–1949)
Paul Douglas (D)		81st (1949–1951)
		82nd (1951–1953)		Everett Dirksen (R)
		83rd (1953–1955)
		84th (1955–1957)
		85th (1957–1959)
		86th (1959–1961)
		87th (1961–1963)
		88th (1963–1965)
		89th (1965–1967)
Charles H. Percy (R)		90th (1967–1969)
		91st (1969–1971)
				Ralph Tyler Smith (R)
				Adlai Stevenson III (D)
		92nd (1971–1973)
		93rd (1973–1975)
		94th (1975–1977)
		95th (1977–1979)
		96th (1979–1981)
		97th (1981–1983)		Alan J. Dixon (D)
		98th (1983–1985)
Paul Simon (D)		99th (1985–1987)
		100th (1987–1989)
		101st (1989–1991)
		102nd (1991–1993)
		103rd (1993–1995)		Carol Moseley Braun (D)
		104th (1995–1997)
Dick Durbin (D)		105th (1997–1999)
		106th (1999–2001)		Peter Fitzgerald (R)
		107th (2001–2003)
		108th (2003–2005)
		109th (2005–2007)		Barack Obama (D)
		110th (2007–2009)
		111th (2009–2011)		Roland Burris (D)
				Mark Kirk (R)
		112th (2011–2013)
		113th (2013–2015)
		114th (2015–2017)
		115th (2017–2019)		Tammy Duckworth (D)
		116th (2019–2021)
		117th (2021–2023)
		118th (2023–2025)
		119th (2025–2027)

United States House of Representatives

Main article: List of United States representatives from Illinois

1812–1818: 1 non-voting delegate

Starting on December 3, 1812, Illinois Territory sent a non-voting delegate to the House.

Years	Delegate from Territory's at-large district
December 3, 1812 – August 2, 1813	Shadrach Bond (DR)
November 14, 1814 – March 3, 1817	Benjamin Stephenson (DR)
March 4, 1817 – November 30, 1818	Nathaniel Pope (DR)

Part of the area of Illinois Territory became the State of Illinois on December 3, 1818.

1818–1833: 1 seat

Following statehood on December 3, 1818, Illinois had one seat in the House.

Congress	At-large district
15th (1818–1819)	John McLean (DR)
16th (1819–1821)	Daniel Pope Cook (DR)
17th (1821–1823)
18th (1823–1825)
19th (1825–1827)	Daniel Pope Cook (NR)
20th (1827–1829)	Joseph Duncan (J)
21st (1829–1831)
22nd (1831–1833)

1833–1843: 3 seats

Following the 1830 census, Illinois was apportioned three seats, all elected via single-member districts.

Congress	1st district	2nd district	3rd district
23rd (1833–1835)	Charles Slade (J)	Zadok Casey (J)	Joseph Duncan (J)
	John Reynolds (J)		William L. May (J)
24th (1835–1837)
25th (1837–1839)	Adam W. Snyder (D)	Zadok Casey (D)	William L. May (D)
26th (1839–1841)	John Reynolds (D)		John T. Stuart (W)
27th (1841–1843)		Zadok Casey (ID)

1843–1853: 7 seats

Following the 1840 census, Illinois was apportioned seven seats.

Congress	1st district	2nd district	3rd district	4th district	5th district	6th district	7th district
28th (1843–1845)	Robert Smith (D)	John A. McClernand (D)	Orlando B. Ficklin (D)	John Wentworth (D)	Stephen A. Douglas (D)	Joseph P. Hoge (D)	John J. Hardin (W)
29th (1845–1847)							Edward D. Baker (W)
							John Henry (W)
30th (1847–1849)	Robert Smith (ID)				William Alexander Richardson (D)	Thomas J. Turner (D)	Abraham Lincoln (W)
31st (1849–1851)	William Henry Bissell (D)		Timothy R. Young (D)			Edward D. Baker (W)	Thomas L. Harris (D)
32nd (1851–1853)		Willis Allen (D)	Orlando B. Ficklin (D)	Richard S. Molony (D)		Thompson Campbell (D)	Richard Yates (W)

1853–1863: 9 seats

Following the 1850 census, Illinois was apportioned nine seats.

Congress	District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th
33rd (1853–1855)	Elihu Washburne (W)	John Wentworth (D)	Jesse O. Norton (W)	James Knox (W)	William Alexander Richardson (D)	Richard Yates (W)	James C. Allen (D)	William H. Bissell (ID)	Willis Allen (D)
34th (1855–1857)	Elihu Washburne (R)	James H. Woodworth (R)	Jesse O. Norton (O)	James Knox (O)		Thomas L. Harris (D)		James L. D. Morrison (D)	Samuel S. Marshall (D)
					Jacob C. Davis (D)
35th (1857–1859)		John F. Farnsworth (R)	Owen Lovejoy (R)	William Kellogg (R)	Isaac N. Morris (D)		Aaron Shaw (D)	Robert Smith (D)
						Charles D. Hodges (D)
36th (1859–1861)						John A. McClernand (D)	James Carroll Robinson (D)	Philip B. Fouke (D)	John A. Logan (D)
37th (1861–1863)		Isaac N. Arnold (R)			William Alexander Richardson (D)
						Anthony L. Knapp (D)			William J. Allen (D)

1863–1873: 14 seats

Following the 1860 census, Illinois was apportioned 14 seats, 13 of which were elected from single member districts and 1 elected at-large statewide.

Congress	District													At-large
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th
38th (1863–1865)	Isaac N. Arnold (R)	John F. Farnsworth (R)	Elihu B. Washburne (R)	Charles M. Harris (D)	Owen Lovejoy (R)	Jesse O. Norton (R)	John R. Eden (D)	John T. Stuart (D)	Lewis W. Ross (D)	Anthony L. Knapp (D)	James Carroll Robinson (D)	William Ralls Morrison (D)	William J. Allen (D)	James C. Allen (D)
					Ebon C. Ingersoll (R)
39th (1865–1867)	John Wentworth (R)			Abner C. Harding (R)		Burton C. Cook (R)	Henry P. H. Bromwell (R)	Shelby M. Cullom (R)		Anthony Thornton (D)	Samuel S. Marshall (D)	Jehu Baker (R)	Andrew J. Kuykendall (R)	Samuel W. Moulton (R)
40th (1867–1869)	Norman B. Judd (R)									Albert G. Burr (D)			Green B. Raum (R)	John A. Logan (R)
41st (1869–1871)			Horatio C. Burchard (R)	John B. Hawley (R)			Jesse H. Moore (R)		Thompson W. McNeely (D)			John B. Hay (R)	John M. Crebs (D)
42nd (1871–1873)	Charles B. Farwell (R)				Bradford N. Stevens (D)	Henry Snapp (R)		James Carroll Robinson (D)		Edward Y. Rice (D)				John Lourie Beveridge (R)

1873–1883: 19 seats

Following the 1870 census, Illinois was apportioned 19 seats, all elected via single member districts.

Cong­ress	District										District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th
43rd (1873–1875)	John Blake Rice (R)	Jasper D. Ward (R)	Charles B. Farwell (R)	Stephen A. Hurlbut (R)	Horatio C. Burchard (R)	John B. Hawley (R)	Franklin Corwin (R)	Greenbury L. Fort (R)	Granville Barrere (R)	William H. Ray (R)	Robert M. Knapp (D)	James Carroll Robinson (D)	John McNulta (R)	Joe Cannon (R)	John R. Eden (D)	James S. Martin (R)	William Ralls Morrison (D)	Isaac Clements (R)	Samuel S. Marshall (D)
44th (1875–1877)	Bernard G. Caulfield (D)	Carter Harrison III (D)				Thomas J. Henderson (R)	Alexander Campbell (I)		Richard H. Whiting (R)	John C. Bagby (D)	Scott Wike (D)	William Springer (D)	Adlai Stevenson I (D)			William A. J. Sparks (D)		William Hartzell (D)	William B. Anderson (I)
			John V. Le Moyne (D)
45th (1877–1879)	William Aldrich (R)		Lorenzo Brentano (R)	William Lathrop (R)			Philip C. Hayes (R)		Thomas A. Boyd (R)	Benjamin F. Marsh (R)	Robert M. Knapp (D)		Thomas F. Tipton (R)						Richard W. Townshend (D)
46th (1879–1881)		George R. Davis (R)	Hiram Barber Jr. (R)	John C. Sherwin (R)	Robert M. A. Hawk (R)						James W. Singleton (D)		Adlai Stevenson I (D)		Albert P. Forsythe (GB)			John R. Thomas (R)
47th (1881–1883)			Charles B. Farwell (R)				William Cullen (R)	Lewis E. Payson (R)	John H. Lewis (R)				Dietrich C. Smith (R)		Samuel W. Moulton (D)
					Robert R. Hitt (R)

1883–1893: 20 seats

Following the 1860 census, Illinois was apportioned 20 seats.

Cong­ress	District										District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th
48th (1883–1885)	Ransom W. Dunham (R)	John F. Finerty (ID)	George R. Davis (R)	George E. Adams (R)	Reuben Ellwood (R)	Robert R. Hitt (R)	Thomas J. Hender­son (R)	William Cullen (R)	Lewis E. Payson (R)	Nicholas E. Worthing­ton (D)	William H. Neece (D)	James M. Riggs (D)	William Springer (D)	Jonathan H. Rowell (R)	Joe Cannon (R)	Aaron Shaw (D)	Samuel W. Moulton (D)	William Ralls Morrison (D)	Richard W. Towns­hend (D)	John R. Thomas (R)
49th (1885–1887)		Frank Lawler (D)	James Hugh Ward (D)		Albert J. Hopkins (R)			Ralph Plumb (R)								Silas Z. Landes (D)	John R. Eden (D)
50th (1887–1889)			William E. Mason (R)							Philip S. Post (R)	William H. Gest (R)	George A. Ander­son (D)					Edward Lane (D)	Jehu Baker (R)
51st (1889–1891)	Abner Taylor (R)							Charles A. Hill (R)				Scott Wike (D)				George W. Fithian (D)		William S. Forman (D)	James R. Williams (D)	George W. Smith (R)
52nd (1891–1893)		Lawrence McGann (D)	Allan C. Durborow Jr. (D)	Walter C. New­berry (D)				Lewis Steward (D)	Herman W. Snow (D)		Benjamin T. Cable (D)			Owen Scott (D)	Samuel T. Busey (D)

1893–1903: 22 seats

Following the 1890 census, Illinois was apportioned 22 seats. Until 1895, 20 seats were elected from single member districts and 2 were elected at-large statewide. In 1895, Illinois redistricted all of its seats.

Cong­ress	District										District										At-large
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th	Seat A	Seat B
53rd (1893–1895)	J. Frank Aldrich (R)	Lawrence McGann (D)	Allan C. Durborow Jr. (D)	Julius Goldzier (D)	Albert J. Hopkins (R)	Robert R. Hitt (R)	Thomas J. Hender­son (R)	Robert A. Childs (R)	Hamilton K. Wheeler (R)	Philip S. Post (R)	Benjamin F. Marsh (R)	John J. McDan­nold (D)	William Springer (D)	Benjamin F. Funk (R)	Joe Cannon (R)	George W. Fithian (D)	Edward Lane (D)	William S. Forman (D)	James R. Williams (D)	George W. Smith (R)	John C. Black (D)	Andrew J. Hunter (D)
54th (1895–1897)		William Lorimer (R)	Lawrence McGann (D)	Charles W. Wood­man (R)	George E. White (R)	Edward D. Cooke (R)	George E. Foss (R)	Albert J. Hopkins (R)	Robert R. Hitt (R)	George W. Prince (R)	Walter Reeves (R)	Joe Cannon (R)	Vespasian Warner (R)	Joseph V. Graff (R)	Benjamin F. Marsh (R)	Finis E. Downing (D)	James A. Connolly (R)	Frederick Remann (R)	Benson Wood (R)	Orlando Burrell (R)	21st district	22nd district
			Hugh R. Belknap (R)													John I. Rinaker (R)		William Hadley (R)			Everett Murphy (R)	George W. Smith (R)
55th (1897–1899)	James Robert Mann (R)			Daniel W. Mills (R)		Henry S. Boutell (R)										William H. Hinrichsen (D)		Thomas M. Jett (D)	Andrew J. Hunter (D)	James R. Campbell (D)	Jehu Baker (D)
56th (1899–1901)			George Peter Foster (D)	Thomas Cusack (D)	Edward T. Noonan (D)											William E. Williams (D)	Ben F. Caldwell (D)		Joseph B. Crowley (D)	James R. Williams (D)	William Roden­berg (R)
57th (1901–1903)		John J. Feely (D)		James McAnd­rews (D)	William F. Mahoney (D)										J. Ross Mickey (D)	Thomas J. Selby (D)					Fred J. Kern (D)

1903–1913: 25 seats

Following the 1900 census, Illinois was apportioned 25 seats.

Congress
58th (1903–1905)
59th (1905–1907)
60th (1907–1909)
61st (1909–1911)
62nd (1911–1913)

District										District										District					Congress
1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th	21st	22nd	23rd	24th	25th
Martin Emerich (D)	James R. Mann (R)	William W. Wilson (R)	George P. Foster (D)	James McAndrews (D)	William Lorimer (R)	Philip Knopf (R)	William F. Mahoney (D)	Henry S. Boutell (R)	George E. Foss (R)	Howard M. Snapp (R)	Charles E. Fuller (R)	Robert R. Hitt (R)	Benjamin F. Marsh (R)	George W. Prince (R)	Joseph V. Graff (R)	John A. Sterling (R)	Joe Cannon (R)	Vespasian Warner (R)	Henry T. Rainey (D)	Ben F. Caldwell (D)	William A. Rodenberg (R)	Joseph B. Crowley (D)	James R. Williams (D)	George W. Smith (R)	58th (1903–1905)
Martin B. Madden (R)			Charles S. Wharton (R)	Anthony Michalek (R)			Charles McGavin (R)						James McKinney (R)					William B. McKinley (R)		Zeno J. Rives (R)		Frank S. Dickson (R)	Pleasant T. Chapman (R)		59th (1905–1907)
			James T. McDermott (D)	Adolph J. Sabath (D)								Frank O. Lowden (R)								Ben F. Caldwell (D)		Martin D. Foster (D)			60th (1907–1909)
																								Napoleon B. Thistlewood (R)
					William Moxley (R)	Frederick Lundin (R)	Thomas Gallagher (D)													James M. Graham (D)					61st (1909–1911)
					Edmund J. Stack (D)	Frank Buchanan (D)		Lynden Evans (D)		Ira C. Copley (R)		John C. McKenzie (R)			Claude U. Stone (D)								H. Robert Fowler (D)		62nd (1911–1913)

1913–1943: 27 seats

Following the 1910 census, Illinois was apportioned 27 seats, 25 of which were elected from single member districts and 2 were elected at-large statewide.

Congress
63rd (1913–1915)
64th (1915–1917)
65th (1917–1919)
66th (1919–1921)
67th (1921–1923)
68th (1923–1925)
69th (1925–1927)
70th (1927–1929)
71st (1929–1931)
72nd (1931–1933)
73rd (1933–1935)
74th (1935–1937)
75th (1937–1939)
76th (1939–1941)
77th (1941–1943)
Congress

District										District										District					At-large		Congress
1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th	21st	22nd	23rd	24th	25th	Seat A	Seat B
Martin B. Madden (R)	James Robert Mann (R)	George E. Gorman (D)	James T. McDermott (D)	Adolph J. Sabath (D)	James McAndrews (D)	Frank Buchanan (D)	Thomas Gallagher (D)	Frederick A. Britten (R)	Charles Thom- son (Prog)	Ira C. Copley (R)	William Hine- baugh (Prog)	John C. McKenzie (R)	Clyde H. Tavenner (D)	Stephen A. Hoxworth (D)	Claude U. Stone (D)	Louis FitzHenry (D)	Frank T. O'Hair (D)	Charles M. Borchers (D)	Henry T. Rainey (D)	James M. Graham (D)	William N. Baltz (D)	Martin D. Foster (D)	H. Robert Fowler (D)	Robert P. Hill (D)	Lawrence B. Stringer (D)	William E. Williams (D)	63rd (1913–1915)
		William Warfield Wilson (R)							George E. Foss (R)	Ira C. Copley (Prog)	Charles Eugene Fuller (R)			Edward John King (R)		John A. Sterling (R)	Joe Cannon (R)	William B. McKinley (R)		Loren E. Wheeler (R)	William A. Rodenberg (R)		Thomas Sutler Williams (R)	Edward E. Denison (R)	Burnett M. Chiperfield (R)		64th (1915–1917)
			C. Martin (D)			Niels Juul (R)				Ira C. Copley (R)			William J. Graham (R)		Clifford C. Ireland (R)										Medill McCormick (R)	William E. Mason (R)	65th (1917–1919)
			John W. Rainey (D)
									Carl R. Chindblom (R)							Frank L. Smith (R)						Edwin B. Brooks (R)			Richard Yates Jr. (R)		66th (1919–1921)
		Elliott W. Sproul (R)			John J. Gorman (R)	M. Alfred Michaelson (R)	Stanley H. Kunz (D)									Frank H. Funk (R)		Allen F. Moore (R)	Guy L. Shaw (R)							Winnifred Mason Huck (R)	67th (1921–1923)
	Morton D. Hull (R)		Thomas A. Doyle (D)		James R. Buckley (D)					Frank R. Reid (R)					William E. Hull (R)		William P. Holaday (R)		Henry T. Rainey (D)	James Earl Major (D)	Edward E. Miller (R)	William W. Arnold (D)				Henry R. Rathbone (R)	68th (1923–1925)
					John J. Gorman (R)							William Richard Johnson (R)	John Clayton Allen (R)					Charles Adkins (R)		Loren E. Wheeler (R)	Edward M. Irwin (R)						69th (1925–1927)
					James T. Igoe (D)						John T. Buckbee (R)					Homer W. Hall (R)				James Earl Major (D)							70th (1927–1929)
Oscar Stanton De Priest (R)														Burnett M. Chiperfield (R)						Frank M. Ramey (R)						Ruth Hanna McCormick (R)	71st (1929–1931)
		Edward A. Kelly (D)	Harry P. Beam (D)			Leonard W. Schuetz (D)	P. C. Granata (R)													James Earl Major (D)	Charles A. Karch (D)		Claude V. Parsons (D)	Kent E. Keller (D)		William H. Dieterich (D)	72nd (1931–1933)
							S. H. Kunz (D)
	P. H. Moynihan (R)				Thomas J. O'Brien (D)		Leo Kocialkowski (D)		James Simpson Jr. (R)			Leo E. Allen (R)	Chester C. Thompson (D)	J. Leroy Adair (D)	Everett Dirksen (R)	Frank Gillespie (D)	James A. Meeks (D)	Donald C. Dobbins (D)			Edwin M. Schaefer (D)				Martin A. Brennan (D)	Walter Nesbit (D)	73rd (1933–1935)
Arthur Wergs Mitchell (D)	Raymond S. McKeough (D)							James McAndrews (D)	Ralph E. Church (R)	Chauncey W. Reed (R)						Leslie C. Arends (R)			Scott W. Lucas (D)	Harry H. Mason (D)						Michael L. Igoe (D)	74th (1935–1937)
											Noah M. Mason (R)			Lewis L. Boyer (D)				Hugh M. Rigney (D)		Frank W. Fries (D)					Edwin V. Champion (D)	Lewis M. Long (D)	75th (1937–1939)
					A. F. Maciejewski (D)								Anton J. Johnson (R)	Robert B. Chiperfield (R)			Jessie Sumner (R)	Bill Wheat (R)	James M. Barnes (D)			Laurence F. Arnold (D)			John C. Martin (D)	T. V. Smith (D)	76th (1939–1941)
								Charles S. Dewey (R)	George A. Paddock (R)											George Evan Howell (R)			James V. Heidinger (R)	C. W. Bishop (R)	Stephen A. Day (R)	William Stratton (R)	77th (1941–1943)
1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th	21st	22nd	23rd	24th	25th	Seat A	Seat B	Congress
District										District										District					At-large

1943–1953: 26 seats

Following the 1940 census, Illinois was apportioned 26 seats. Until 1949, 25 seats were elected from single member districts and 1 was elected at-large statewide. From 1949, all 26 seats were redistricted.

Congress
78th (1943–1945)
79th (1945–1947)
80th (1947–1949)
81st (1949–1951)
82nd (1951–1953)

District										District										District						Congress
1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th	21st	22nd	23rd	24th	25th	At-large
William L. Dawson (D)	William A. Rowan (D)	Fred E. Busbey (R)	Martin Gorski (D)	Adolph J. Sabath (D)	Thomas J. O'Brien (D)	Leonard W. Schuetz (D)	Thomas S. Gordon (D)	Charles S. Dewey (R)	Ralph E. Church (R)	Chauncey W. Reed (R)	Noah M. Mason (R)	Leo E. Allen (R)	Anton J. Johnson (R)	Robert B. Chiperfield (R)	Everett Dirksen (R)	Leslie C. Arends (R)	Jessie Sumner (R)	William H. Wheat (R)	Sid Simpson (R)	George Evan Howell (R)	Calvin D. Johnson (R)	Charles W. Vursell (R)	James V. Heidinger (R)	C. W. Bishop (R)	Stephen A. Day (R)	78th (1943–1945)
		Edward A. Kelly (D)				William W. Link (D)		Alexander J. Resa (D)										Rolla C. McMillen (R)			Melvin Price (D)				Emily Taft Douglas (D)	79th (1945–1947)
	Richard B. Vail (R)	Fred E. Busbey (R)				Thomas L. Owens (R)		Robert Twyman (R)									Edward H. Jenison (R)						Roy Clippinger (R)		William Stratton (R)	80th (1947–1949)
	Barratt O'Hara (D)	Neil J. Linehan (D)	James V. Buckley (D)	Martin Gorski (D)		Adolph J. Sabath (D)		Sidney R. Yates (D)	Richard W. Hoffman (R)	Chester A. Chesney (D)	Edgar A. Jonas (R)	Ralph E. Church (R)	Chauncey W. Reed (R)	Noah M. Mason (R)	Leo E. Allen (R)		Harold H. Velde (R)	Robert B. Chiperfield (R)		Peter F. Mack Jr. (D)	Rolla C. McMillen (R)	Edward H. Jenison (R)	Charles W. Vursell (R)	Melvin Price (D)	26th	81st (1949–1951)
																									C. W. Bishop (R)
	Richard B. Vail (R)	Fred E. Busbey (R)	William E. McVey (R)	John C. Kluczynski (D)						Timothy P. Sheehan (R)		Marguerite Church (R)									William L. Springer (R)					82nd (1951–1953)

1953–1963: 25 seats

Following the 1950 census, Illinois was apportioned 25 seats, all of which were elected from single-member districts.

Congress
83rd (1953–1955)
84th (1955–1957)
85th (1957–1959)
86th (1959–1961)
87th (1961–1963)

District										District										District					Cong­ress
1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th	21st	22nd	23rd	24th	25th
William L. Dawson (D)	Barratt O'Hara (D)	Fred E. Busbey (R)	William E. McVey (R)	John C. Kluczynski (D)	Thomas J. O'Brien (D)	James Bowler (D)	Thomas S. Gordon (D)	Sidney R. Yates (D)	Richard W. Hoffman (R)	Timothy P. Sheehan (R)	Edgar A. Jonas (R)	Marguerite Church (R)	Chauncey W. Reed (R)	Noah M. Mason (R)	Leo E. Allen (R)	Leslie C. Arends (R)	Harold H. Velde (R)	Robert B. Chiperfield (R)	Sid Simpson (R)	Peter F. Mack Jr. (D)	William L. Springer (R)	Charles W. Vursell (R)	Melvin Price (D)	C. W. Bishop (R)	83rd (1953–1955)
		James C. Murray (D)									Charles A. Boyle (D)													Ken Gray (D)	84th (1955–1957)
		Emmet Byrne (R)							Harold R. Collier (R)				Russell W. Keeney (R)				Bob Michel (R)								85th (1957–1959)
		William T. Murphy (D)	Ed Derwinski (R)			Roland V. Libonati (D)	Dan Rosten- kowski (D)			Roman Pucinski (D)			Elmer Hoffman (R)						Edna O. Simpson (R)			George E. Shipley (D)			86th (1959–1961)
											Edward R. Finnegan (D)				John B. Anderson (R)				Paul Findley (R)						87th (1961–1963)

1963–1983: 24 seats

Following the 1960 census, Illinois was apportioned 24 seats.

Congress
88th (1963–1965)
89th (1965–1967)
90th (1967–1969)
91st (1969–1971)
92nd (1971–1973)
93rd (1973–1975)
94th (1975–1977)
95th (1977–1979)
96th (1979–1981)
97th (1981–1983)

District										District										District				Congress
1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th	21st	22nd	23rd	24th
William L. Dawson (D)	Barratt O'Hara (D)	William T. Murphy (D)	Ed Derwinski (R)	John C. Kluczynski (D)	Thomas J. O'Brien (D)	Roland V. Libonati (D)	Dan Rosten- kowski (D)	Edward R. Finnegan (D)	Harold R. Collier (R)	Roman Pucinski (D)	Bob McClory (R)	Donald Rumsfeld (R)	Elmer Hoffman (R)	Charlotte Thompson Reid (R)	John B. Anderson (R)	Leslie C. Arends (R)	Bob Michel (R)	Robert T. McLoskey (R)	Paul Findley (R)	Ken Gray (D)	William L. Springer (R)	George E. Shipley (D)	Melvin Price (D)	88th (1963–1965)
					Daniel J. Ronan (D)	Frank Annunzio (D)		Sidney R. Yates (D)					John Erlenborn (R)					Gale Schisler (D)						89th (1965–1967)
																		Tom Railsback (R)						90th (1967–1969)
	Abner Mikva (D)											Phil Crane (R)												91st (1969–1971)
Ralph Metcalfe (D)		Morgan F. Murphy (D)			George W. Collins (D)									Cliffard D. Carlson (R)										92nd (1971–1973)
	Morgan F. Murphy (D)	Robert P. Hanrahan (R)			Harold R. Collier (R)	Cardiss Collins (D)			Samuel H. Young (R)	Frank Annunzio (D)	Phil Crane (R)	Bob McClory (R)		Leslie C. Arends (R)		George M. O'Brien (R)				Ed Madigan (R)	George E. Shipley (D)	Melvin Price (D)	Ken Gray (D)	93rd (1973–1975
		Marty Russo (D)			Henry Hyde (R)				Abner Mikva (D)					Tim Lee Hall (D)									Paul Simon (D)	94th (1975–1977)
				John G. Fary (D)										Tom Corcoran (R)										95th (1977–1979)
Bennett Stewart (D)																					Dan Crane (R)			96th (1979–1981)
Harold Washington (D)	Gus Savage (D)								John Porter (R)						Lynn M. Martin (R)									97th (1981–1983)

1983–1993: 22 seats

Following the 1980 census, Illinois was apportioned 22 seats.

Cong­ress	District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th	21st	22nd
98th (1983–1985)	Harold Washing­ton (D)	Gus Savage (D)	Marty Russo (D)	George M. O'Brien (R)	Bill Lipinski (D)	Henry Hyde (R)	Cardiss Collins (D)	Dan Rosten­kowski (D)	Sidney Yates (D)	John Porter (R)	Frank Annunzio (D)	Phil Crane (R)	John Erlen­born (R)	Tom Corcoran (R)	Ed Madigan (R)	Lynn M. Martin (R)	Lane Evans (D)	Bob Michel (R)	Dan Crane (R)	Dick Durbin (D)	Melvin Price (D)	Paul Simon (D)
99th (1985–1987)	Charles Hayes (D)												Harris Fawell (R)	John Grotberg (R)					Terry L. Bruce (D)			Ken Gray (D)
100th (1987–1989)				Jack Davis (R)										Dennis Hastert (R)
101st (1989–1991)				George Sang­meister (D)																	Jerry Costello (D)	Glenn Poshard (D)
102nd (1991–1993)																John Cox (D)

1993–2003: 20 seats

Following the 1990 census, Illinois was apportioned 20 seats.

Cong­ress	District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th	20th
103rd (1993–1995)	Bobby Rush (D)	Mel Reynolds (D)	Bill Lipinski (D)	Luis Gutiérrez (D)	Dan Rosten­kowski (D)	Henry Hyde (R)	Cardiss Collins (D)	Phil Crane (R)	Sidney Yates (D)	John Porter (R)	George Sang­meister (D)	Jerry Costello (D)	Harris Fawell (R)	Dennis Hastert (R)	Tom Ewing (R)	Don Manzullo (R)	Lane Evans (D)	Bob Michel (R)	Glenn Poshard (D)	Dick Durbin (D)
104th (1995–1997)					Michael Flanagan (R)						Jerry Weller (R)							Ray LaHood (R)
105th (1997–1999)		Jesse Jackson Jr. (D)			Rod Blago­jevich (D)		Danny Davis (D)													John Shimkus (R)
106th (1999–2001)									Jan Schakow­sky (D)				Judy Biggert (R)						David Phelps (D)
107th (2001–2003)										Mark Kirk (R)					Tim Johnson (R)

2003–2013: 19 seats

Following the 2000 census, Illinois was apportioned 19 seats.

Congress	District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th	19th
108th (2003–2005)	Bobby Rush (D)	Jesse Jackson Jr. (D)	Bill Lipinski (D)	Luis Gutiérrez (D)	Rahm Emanuel (D)	Henry Hyde (R)	Danny Davis (D)	Phil Crane (R)	Jan Schakowsky (D)	Mark Kirk (R)	Jerry Weller (R)	Jerry Costello (D)	Judy Biggert (R)	Dennis Hastert (R)	Tim Johnson (R)	Don Manzullo (R)	Lane Evans (D)	Ray LaHood (R)	John Shimkus (R)
109th (2005–2007)			Dan Lipinski (D)					Melissa Bean (D)
110th (2007–2009)						Peter Roskam (R)											Phil Hare (D)
111th (2009–2011)					Mike Quigley (D)						Debbie Halvorson (D)			Bill Foster (D)				Aaron Schock (R)
112th (2011–2013)								Joe Walsh (R)		Bob Dold (R)	Adam Kinzinger (R)			Randy Hultgren (R)			Bobby Schilling (R)

2013–2023: 18 seats

Following the 2010 census, Illinois was apportioned 18 seats.

Congress	District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th	18th
113th (2013–2015)	Bobby Rush (D)	Robin Kelly (D)	Dan Lipinski (D)	Luis Gutiérrez (D)	Mike Quigley (D)	Peter Roskam (R)	Danny Davis (D)	Tammy Duck­worth (D)	Jan Schakow­sky (D)	Brad Schneider (D)	Bill Foster (D)	William Enyart (D)	Rodney Davis (R)	Randy Hultgren (R)	John Shimkus (R)	Adam Kinzinger (R)	Cheri Bustos (D)	Aaron Schock (R)
114th (2015–2017)										Bob Dold (R)		Mike Bost (R)
																		Darin LaHood (R)
115th (2017–2019)								Raja Krishna­moorthi (D)		Brad Schneider (D)
116th (2019–2021)				Chuy García (D)		Sean Casten (D)								Lauren Under­wood (D)
117th (2021–2023)			Marie Newman (D)												Mary Miller (R)

2023–present: 17 seats

Following the 2020 census, Illinois was apportioned 17 seats.

Congress	District
	1st	2nd	3rd	4th	5th	6th	7th	8th	9th	10th	11th	12th	13th	14th	15th	16th	17th
118th (2023–2025)	Jonathan Jackson (D)	Robin Kelly (D)	Delia Ramirez (D)	Chuy García (D)	Mike Quigley (D)	Sean Casten (D)	Danny Davis (D)	Raja Krishnamoorthi (D)	Jan Schakow­sky (D)	Brad Schneider (D)	Bill Foster (D)	Mike Bost (R)	Nikki Budzinski (D)	Lauren Underwood (D)	Mary Miller (R)	Darin LaHood (R)	Eric Sorensen (D)
119th (2025–2027)

Key

Democratic (D)

Democratic-Republican (DR)

Greenback (GB)

Independent Democrat (ID)

Jacksonian (J)

Liberal Republican (LR)

National Republican (NR)

Opposition Northern (O)

Progressive (Bull Moose) (Prog)

Republican (R)

Whig (W)

Independent (I)

See also

• List of United States congressional districts
• Illinois's congressional districts
• Political party strength in Illinois