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 CPVI : Class II senator Class III senator Dick Durbin Tammy Duckworth Party Incumbent since January 3, 1997 January 3, 2017 Illinois's current congressional delegation in the 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.
United States Senate
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
1812–1818: 1 non-voting delegate Starting on December 3, 1812, Illinois Territory sent a non-voting delegate to the House.
Years Delegate from 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 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 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 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 AlexanderRichardson (D) Thomas J. Turner (D) Abraham Lincoln (W) 31st (1849–1851) William HenryBissell (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 33rd Elihu Washburne (W) John Wentworth (D) Jesse O. Norton (W) James Knox (W) William AlexanderRichardson (D) Richard Yates (W) James C.Allen (D) William H. Bissell (ID) Willis Allen (D) 34th 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 John F.Farnsworth (R) Owen Lovejoy (R) WilliamKellogg (R) Isaac N. Morris (D) Aaron Shaw (D) Robert Smith (D) Charles D. Hodges (D) 36th John A.McClernand (D) James CarrollRobinson (D) Philip B. Fouke (D) John A. Logan (D) 37th Isaac N. Arnold (R) William AlexanderRichardson (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 38th Isaac N.Arnold (R) John F.Farnsworth(R) Elihu B.Washburne (R) Charles M.Harris (D) OwenLovejoy (R) Jesse O.Norton (R) John R.Eden (D) John T.Stuart (D) Lewis W.Ross (D) Anthony L.Knapp (D) James CarrollRobinson (D) William RallsMorrison (D) William J.Allen (D) James C.Allen (D) Ebon C.Ingersoll (R) 39th JohnWentworth (R) Abner C.Harding (R) Burton C.Cook (R) Henry P. H.Bromwell (R) Shelby M.Cullom (R) AnthonyThornton (D) Samuel S.Marshall (D) JehuBaker (R) Andrew J.Kuykendall (R) Samuel W.Moulton (R) 40th Norman B.Judd (R) Albert G.Burr (D) Green B.Raum (R) John A.Logan (R) 41st 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 Charles B.Farwell (R) Bradford N.Stevens (D) HenrySnapp (R) James CarrollRobinson (D) Edward Y.Rice (D) John LourieBeveridge (R)
1873–1883: 19 seats Following the 1870 census, Illinois was apportioned 19 seats, all elected via single member districts.
Congress District District 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 CarrollRobinson (D) John McNulta (R) Joe Cannon (R) John R. Eden (D) James S.Martin (R) William RallsMorrison (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) WilliamSpringer (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 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.