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Illinois's 12th Congressional District

Results updated Nov 7, 1:00 AM ET

Mike Bost (Republican) was re-elected in Illinois's 12th Congressional District in 2026, defeating Julie Fortier 69.7% to 30.3%.

Map of Illinois's 12th Congressional District (2026 lines)
Representative-electMike Bost (R), re-elected
Current representativeMike Bost (R), through January 3, 2027
District linesUnchanged for 2026
Partisan lean (PVI)R+22
PoliGov final forecastSafe R · Julie Fortier <1%, Mike Bost >99%

2026 results

Called

CandidateVoteVotes
Mike Bost (R)69.7%194,651
Julie Fortier (D)30.3%84,768

91% of the expected vote counted. Vote counts are unofficial until certified.

Other Illinois districts

IL-1 · IL-2 · IL-3 · IL-4 · IL-5 · IL-6 · IL-7 · IL-8 · IL-9 · IL-10 · IL-11 · IL-13 · IL-14 · IL-15 · IL-16 · IL-17

All Illinois districts · Illinois forecast and results · Illinois senators · Illinois governor

Results and race calls: civicAPI, updated Nov 7, 1:00 AM ET. Vote counts are unofficial until certified.