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

Election Calendar

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Election and Campaign Finance Calendar

For additional information please visit the Illinois State Board of Elections website:


Even Numbered Years

General Primary: Third Tuesday in March
Nomination of Federal, State and County candidates by an established political party

General Election: First Tuesday after the First Monday in November
Election of Federal, State and County officials


Odd Numbered Years

Consolidated Primary: Last Tuesday in February
Nomination of Township and Municipal candidates

Consolidated Election: First Tuesday in April
Election of Township, Municipal, Park District, Library District, School District and Fire District officials


Future Election Dates
March 17, 2020 - General Primary
November 3, 2020 - General Election