The County Courthouse and Administration building are CLOSED except for mandated and essential services. Please see Latest News for details.

County Clerk's Office - Joseph J. Tirio, McHenry County Clerk

Voter Information

March 17, 2020 Primary Election

Early Voting

  • Early voting begins on March 2nd at a number of locations around the county. For times dates and locations, click here.

Sample Ballots, Voter's Guide and Polling Place Finder

Official Candidate Filings


Change of Address

Download the Voter Registration Change of Address form here: Voter Registration Change of Address Form

The form must be completed, and then returned to the McHenry County Clerk’s office either by e-mail or mail:

[email protected]

McHenry County Clerk
2200 N Seminary Ave
Woodstock, IL 60098