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2026 candidates we're tracking in IL-12
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Mike Bost
Republican
Incumbent
Mike Bost is the sitting U.S. Representative for this district, per the chamber's membership roster.
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Julie Fortier
Democratic
Julie Fortier is a research microbiologist and U.S. Air Force veteran, per press coverage of the race.
About this race
Illinois's 12th Congressional District elects one member of the U.S. House of Representatives to a two-year term. Every House seat in the country is on the ballot in 2026. The Illinois primary is Tuesday, March 17, 2026, and the general election is Tuesday, November 3, 2026.