Illinois
Voter registration data provided by and in collaboration with L2 Data, a trusted provider of nonpartisan voter data.
For an explanation of L2's state-specific partisan breakdown estimates, CLICK HERE.
Percentages are rounded to the nearest hundredth decimal.
Last Updated: August 8, 2025.
Primary Type
Congressional/State:
Open (Partisan)
Presidential:
Open (Partisan)
Party Registration Statistics
Voters do not register with a political party.
Election Litigation
None currently underway.
Major Parties
Democratic, Republican
Independent & Electoral Reform Organizations
