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


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The County Clerk is the chief election authority administering elections throughout McHenry County. We offer election-related services to candidates, political parties, press, local units of government and the general public. These services include voting by mail programs, early voting, and securing voting sites. Other services include recruitment, training and scheduling election judges and election workers, as well as election night tabulation of results and conducting the official canvass of elections.

It is the mission of the County Clerk's Office to conduct all elections in a fair, accurate, impartial and efficient manner. The County Clerk's office will preserve all election results and make said files accessible to all people. Said office will accurately maintain all filings and records as mandated by law.


Early voting available at a number of locations around the county.

Check here for dates, times and locations.


Election Information




Referenda for the March 17th General Primary Election (as of 1/9/2020)

List of all candidates (other than Precinct Committeepersons) for the March 17th Primary Election.