Redistricting Roundup: Illinois legislature enacts revised district boundaries for state House, Senate

Today’s redistricting roundup includes news from Illinois and Ohio.


The Illinois House and Senate approved new state legislative boundaries on Aug. 31 during a special session. The maps, which passed 73-43 in the state House, and 40-17 in the state Senate, revised legislative redistricting plans enacted in June. The maps the state approved in June were drawn to meet the Illinois Constitution’s June 30 deadline for approving a state legislative redistricting plan and were adopted before the U.S. Census Bureau released block-level data from the 2020 census on Aug. 12. Click here to view the new state House map and here to view the Senate map.

Two lawsuits that were filed in federal district court challenging the June legislative maps were consolidated on July 14. The minority leaders of the Illinois House and Senate and the Mexican American Legal Defense and Educational Fund argued that those redistricting plans did not ensure that the districts had substantially equal populations because they used data from the American Community Survey (ACS) instead of the 2020 census. The trial in the consolidated lawsuit is scheduled to begin on Sept. 27. 

Legislators have not yet proposed a congressional redistricting plan in Illinois.


The Ohio Redistricting Commission met on Aug. 31 and decided it would hold three additional public hearings before approving proposed maps, as opposed to a single public hearing required by law. The Commission’s meeting follows 10 public sessions held in various locations across the state from Aug. 23 to Aug. 27.

The Commission did not approve new state legislative districts by its initial Sept. 1 deadline, and the final deadline for the creation of new legislative boundaries is Sept 15. Rep. Bob Cupp (R), a co-chair of the commission, said the late release of census data was the cause of the Commission’s delay and estimated maps would be formally proposed in 10-12 days. The Ohio Redistricting Commission is made up of five Republicans—including Gov. Mike DeWine (R)—and two Democrats.

Additional reading: