Illinois's congressional districts

The Illinois General Assembly has the primary responsibility of redrawing congressional district lines following each decennial census.

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.

[2][3] In the 2022 midterm elections, per the 2020 United States census, Illinois lost a congressional seat.

The delegation in the 118th United States Congress has a total of 17 members, with 14 Democrats and 3 Republicans as of 2023.