Illinois's congressional districts

Illinois is divided into 17 congressional districts, each represented by a member of the United States House of Representatives. The majority of Illinois' districts are located in the Chicago area.

The Illinois General Assembly has the primary responsibility of redrawing congressional district lines following each decennial census. The governor of Illinois has the power to veto proposed congressional district maps, but the General Assembly has the power to override the veto with the support of 3/5^ths of both chambers. In 1971, 1981, and 1991 the General Assembly was unable to come to an agreement, and the map was drawn up by a panel of three federal judges chosen by Democrats and Republicans.^[1] ^[2]

In 2001, the General Assembly was again unable to reach an agreement, and the task of redrawing district boundaries was given to the Illinois congressional delegation. With unified Democratic control of the General Assembly and governor's office during the 2011 and 2021 redistricting cycles, Democrats have been able to redistrict without input from Republicans leading to districts gerrymandered to favor the Democratic Party.^[2]^[3]

In the 2022 midterm elections, per the 2020 United States census, Illinois lost a congressional seat.^[4] From a high of 27 congressional seats apportioned to Illinois following the 1910 and 1930 censuses, the state has lost one to two seats in every reapportionment cycle since 1940 with the exception of the cycle following the 1970 census.

Current districts and representatives

List of members of the United States House delegation from Illinois, their terms, district maps, and the district political ratings according to the CPVI. The delegation in the 118th United States Congress has a total of 17 members, with 14 Democrats and 3 Republicans as of 2023.

Current U.S. representatives from Illinois
District	Member (Residence)^[5]	Party	Incumbent since	CPVI (2022)^[6]	District map
1st	Jonathan Jackson (Chicago)	Democratic	January 3, 2023	D+20
2nd	Robin Kelly (Matteson)	Democratic	April 11, 2013	D+19
3rd	Delia Ramirez (Chicago)	Democratic	January 3, 2023	D+20
4th	Chuy García (Chicago)	Democratic	January 3, 2019	D+22
5th	Mike Quigley (Chicago)	Democratic	April 7, 2009	D+18
6th	Sean Casten (Downers Grove)	Democratic	January 3, 2019	D+3
7th	Danny Davis (Chicago)	Democratic	January 3, 1997	D+36
8th	Raja Krishnamoorthi (Schaumburg)	Democratic	January 3, 2017	D+6
9th	Jan Schakowsky (Evanston)	Democratic	January 3, 1999	D+19
10th	Brad Schneider (Deerfield)	Democratic	January 3, 2017	D+11
11th	Bill Foster (Naperville)	Democratic	January 3, 2013	D+5
12th	Mike Bost (Murphysboro)	Republican	January 3, 2015	R+24
13th	Nikki Budzinski (Springfield)	Democratic	January 3, 2023	D+3
14th	Lauren Underwood (Naperville)	Democratic	January 3, 2019	D+4
15th	Mary Miller (Oakland)	Republican	January 3, 2021	R+22
16th	Darin LaHood (Peoria)	Republican	September 10, 2015	R+13
17th	Eric Sorensen (Moline)	Democratic	January 3, 2023	D+2

Historical and present district boundaries

Table of United States congressional district boundary maps in the State of Illinois, presented chronologically.^[7] All redistricting events that took place in Illinois from statehood in 1818 to 2013 are shown. During the periods of 1863-1873, 1893-1895, and 1903-1948, voters in Illinois elected an additional one to two at-large representatives.

Year	Statewide map	Chicago highlight
1818-1833	From 1818-1833 Illinois was represented by a single at-large member of Congress.
1833-1843
1843-1853
1853-1863
1863-1873
1873-1883
1883-1895
1895-1903
1903-1948
1949-1952
1953-1962
1963-1966
1967-1972
1973–1982
1983–1992
1993–2002
2003–2013
2013–2023

Obsolete districts

References

^ "Illinois". The American Redistricting Project. Retrieved April 18, 2024.
^ a b "A guide to political redistricting in Illinois". Chicago Tribune. April 19, 2021. Retrieved April 18, 2024.
^ "Redistricting Report Card". gerrymander.princeton.edu. Retrieved April 18, 2024.
^ Merica, Dan; Stark, Liz (April 26, 2021). "Census Bureau announces 331 million people in US, Texas will add two congressional seats". CNN. Retrieved April 26, 2021.
^ "Office of the Clerk, U.S. House of Representatives". clerk.house.gov. Retrieved January 10, 2022.
^ "2022 Cook PVI: District Map and List". Cook Political Report. Retrieved January 8, 2023.
^ "Digital Boundary Definitions of United States Congressional Districts, 1789–2012". Retrieved October 18, 2014.

External links

"Explore U.S. House Candidates by Congressional District", interactive map, WTTW

[1] "Illinois". The American Redistricting Project. Retrieved April 18, 2024.

[:0-2] "A guide to political redistricting in Illinois". Chicago Tribune. April 19, 2021. Retrieved April 18, 2024.

[3] "Redistricting Report Card". gerrymander.princeton.edu. Retrieved April 18, 2024.

[4] Merica, Dan; Stark, Liz (April 26, 2021). "Census Bureau announces 331 million people in US, Texas will add two congressional seats". CNN. Retrieved April 26, 2021.

[5] "Office of the Clerk, U.S. House of Representatives". clerk.house.gov. Retrieved January 10, 2022.

[6] "2022 Cook PVI: District Map and List". Cook Political Report. Retrieved January 8, 2023.

[7] "Digital Boundary Definitions of United States Congressional Districts, 1789–2012". Retrieved October 18, 2014.