Since

Illinois Illinois ( ) is a state in the Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolitan areas include, Peoria and Rock ...

became a U.S. state in 1818, it has sent congressional delegations to the

United States Senate The United States Senate is the upper chamber of the United States Congress, with the House of Representatives being the lower chamber. Together they compose the national bicameral legislature of the United States. The composition and po ...

and

United States House of Representatives The United States House of Representatives, often referred to as the House of Representatives, the U.S. House, or simply the House, is the lower chamber of the United States Congress, with the Senate being the upper chamber. Together they ...

. 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

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 Richard Joseph Durbin (born November 21, 1944) is an American lawyer and politician serving as the senior United States senator from Illinois, a seat he has held since 1997. A member of the Democratic Party, Durbin has served as the Senate De ...

, 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

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 The United States census of 1840 was the sixth census of the United States. Conducted by the Census Office on June 1, 1840, it determined the resident population of the United States to be 17,069,453 – an increase of 32.7 percent over the 12 ...

, 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 The United States census of 1870 was the ninth United States census. It was conducted by the Census Bureau from June 1, 1870, to August 23, 1871. The 1870 census was the first census to provide detailed information on the African-American popu ...

, Illinois was apportioned 19 seats, all elected via single member districts.

1883–1895: 20 seats

Following the 1860 census, Illinois was apportioned 20 seats.

1893–1903: 22 seats

Following the

1890 census The United States census of 1890 was taken beginning June 2, 1890, but most of the 1890 census materials were destroyed in 1921 when a building caught fire and in the subsequent disposal of the remaining damaged records. It determined the reside ...

, 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 The United States census of 1940, conducted by the Census Bureau, determined the resident population of the United States to be 132,164,569, an increase of 7.3 percent over the 1930 population of 122,775,046 people. The census date of record w ...

, 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.

From 2023-Present: 17 seats

Following the 2020 census, Illinois was apportioned 17 seats.

Key

Notes

References

{{U.S. congressional delegations

Politics of Illinois Congressional delegations

Current delegation

United States Senate

United States House of Representatives

1812–1818: 1 non-voting delegate

1818–1833: 1 seat

1833–1843: 3 seats

1843–1853: 7 seats

1853–1863: 9 seats

1863–1873: 14 seats

1873–1883: 19 seats

1883–1895: 20 seats

1893–1903: 22 seats

1903–1913: 25 seats

1913–1943: 27 seats

1943–1953: 26 seats

1953–1963: 25 seats

1963–1983: 24 seats

1983–1993: 22 seats

1993–2003: 20 seats

2003–2013: 19 seats

2013–2023: 18 seats

From 2023-Present: 17 seats

Key

See also

Notes

References