What is Redistricting?

Redistricting refers to the process of redefining the political geographic boundaries including representative districts, senate districts, and congressional districts. The State Constitution gives the General Assembly the responsibility for redrawing legislative boundaries every ten years.

 

According to the Illinois State Constitution:

 

“In the year following each Federal decennial census year, the General Assembly by law shall redistrict the Legislative Districts and Representative Districts” (Article IV, Section 3).

 

This web site has been prepared to provide the public and any interested parties with information about Illinois’ redistricting process.

Redistricting 2021

2011 Adopted Maps


State Legislative Districts

(Public Act 97-0006)

Google mapCensus data

Shape files

Block equivalency file



Congressional Districts

(Public Act 97-0014)

Google mapCensus data

Shape files

Block equivalency file



Cook County Board of Review

Districts (Public Act 97-0015)

Google mapCensus data

Shape files

Block equivalency file