Illinois's congressional delegations

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 ==

== 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. 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. 1833–1843: 3 seats Following the 1830 census, Illinois was apportioned three seats, all elected via single-member districts. 1843–1853: 7 seats Following the 1840 census, Illinois was apportioned seven seats. 1853–1863: 9 seats Following the 1850 census, Illinois was apportioned nine seats. 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. 1873–1883: 19 seats Following the 1870 census, Illinois was apportioned 19 seats, all elected via single member districts. 1883–1893: 20 seats Following the 1860 census, Illinois was apportioned 20 seats. 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. 1903–1913: 25 seats Following the 1900 census, Illinois was apportioned 25 seats. 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. 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. 1953–1963: 25 seats Following the 1950 census, Illinois was apportioned 25 seats, all of which were elected from single-member districts. 1963–1983: 24 seats Following the 1960 census, Illinois was apportioned 24 seats. 1983–1993: 22 seats Following the 1980 census, Illinois was apportioned 22 seats. 1993–2003: 20 seats Following the 1990 census, Illinois was apportioned 20 seats. 2003–2013: 19 seats Following the 2000 census, Illinois was apportioned 19 seats. 2013–2023: 18 seats Following the 2010 census, Illinois was apportioned 18 seats. 2023–present: 17 seats Following the 2020 census, Illinois was apportioned 17 seats. == Key ==