Monday, January 18th, 2021

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 after the release of the decennial Census.

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).

The 2010 Census provides detailed population and demographic data necessary for state legislatures to conduct redistricting. The 2010 census also determines the congressional reapportionment – which is the process of deciding how the 435 congressional districts will be “apportioned” among the 50 states.

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