Wednesday, 2/11/2026 - The 2026 General Primary Election in Illinois is on Tuesday, 3/17/2026. February 5 was the first day to vote by mail and early voting is now underway in DuPage and Kane counties. Here are some key dates for Illinois voters. 

February 17, 2026: Last day for regular (paper) voter registration.
February 18, 2026: First day of grace period for in-person voter registration and voting at election authority and early voting sites; continues through Election Day 
March 1, 2026: Last day for online voter registration. Grace period registration is still available at election authority and early voting sites.
March 12, 2026: Last day for election authority to receive vote by mail applications.
March 17, 2026: Primary Election Day! Polls are open from 6 a.m. to 7 p.m.
General Election Day is November 3, 2026.

Fore more voter information & links to your county clerk's office, visit the Voter Information page.