The 2026 St. Charles County Executive election will be held on November 3, 2026, following party primaries on August 4, 2026. Incumbent County Executive Steve Ehlmann, who has served in the position since 2007, announced in June 2023 that he would not seek a sixth term, but stated in August 2025 that he was reconsidering the decision, and announced in October 2025 that he would run for re-election.
Republican primary Candidates Declared Steve Ehlmann, incumbent County Executive (previously declined) Bill Eigel, former state senator and candidate for governor in 2024 Jason Law, Mayor of Lake St. Louis Arnie "AC" Deinoff, perennial candidate
Withdrawn Mike Elam, Chairman of the County Council (running for re-election, endorsed Ehlmann)
Declined Nick Guccione, Mayor of Wentzville (endorsed Ehlmann)
Polling
Poll source Date(s)administered Samplesize Marginof error BillEigel MikeElam NickGuccione JasonLaw UndecidedSurvey MissouriAugust 19 & 25, 2025335 (RV)± 3.5%39%7%11%9%34%Survey MissouriApril 22–23, 2025408 (RV)± 3.2%40%10%11.7%1.7%36.7%
Debate + 2026 St. Charles County Executive Republican primary debate Date Host Moderator Link Republican Republican RepublicanKey: Participant Absent Not invited Invited Withdrawn Steve Ehlmann Bill Eigel Jason Law1 Jun. 2, 2026 Lindenwood University Jamie Allman YouTube
Democratic primary Nominee David Veneziano
General election Results
Notes
References
External links Official campaign websites Steve Ehlmann (R) for County Executive Bill Eigel (R) for County Executive Jason Law (R) for County Executive David Veneziano (D) for County Executive