Mike Henderson
State Senator, Missouri Senate District 3 · Republican
OfficeholderNot running in 2026
Ballot status source: Missouri SOS — Certification of Candidates and Party Emblems, 2026 General Election — Missouri State Senate District 3 · read Sep 24, 2026
Sources (2)
- Missouri SOS — Certification of Candidates and Party Emblems, 2026 General Election — Missouri State Senate District 3 (odd-numbered) not on 2026 ballot
- odd-numbered districts last elected November 2024, term through January 2029
The District
What Missouri Senate District 3 covers
Covers all of Washington County, Crawford County, Ste. Genevieve County and St. Francois County; part of Jefferson County.
Includes Park Hills, Farmington, Terre du Lac, De Soto, Goose Creek Lake, Grayhawk, Ozora, Bloomsdale, Bonne Terre, Cuba, Desloge, Doe Run and 27 more.
90 precincts · District lines: State senate lines: U.S. Census Bureau (1:500,000 cartographic boundary) · Precinct lines: U.S. Census Bureau, 2020 TIGER/Line voting districts (VTD20)
Results
Certified results for Missouri Senate District 3
State Senator District 3
2024 General Election · Nov 5, 2024| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mike HendersonRepublican | Republican | 16,744 | 72.8% |
| Doug HalbertDemocrat | Democrat | 6,252 | 27.2% |
Official — Missouri Secretary of State, Official Results as certified by the Board of State Canvassers · Missouri Secretary of State — Official Results by County
State Senator District 3
2020 General Election · Nov 3, 2020| Candidate | Party | Votes | Share |
|---|---|---|---|
| Elaine Freeman Gannon | 20,578 | 100.0% |
Official — Missouri Secretary of State, Official Results as certified by the Board of State Canvassers · Missouri Secretary of State — Official Results by County
Not on file for Mike yet: Key Votes, Their Money, Advertising, In Their Words, In the News, Reach Them, Polls, The Paper Trail. Coverage varies by state and office.
File read Sep 25, 2026. Each item names its source. Record ID p_0znwz1933.
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