Mark Spreitzer
State Senator, Wisconsin Senate District 15 · Democrat
OfficeholderOn the 2026 ballotIncumbent · Wisconsin Senate District 15 · Nov 3 General
Ballot status source: Wisconsin Elections Commission — Candidates on Ballot by Election, 2026 General Election 11/3/2026: SD15, Mark Spreitzer (Democratic) · read Sep 24, 2026
The District
What Wisconsin Senate District 15 covers
Covers parts of Rock County, Walworth County and Jefferson County.
Includes Janesville, Beloit, Whitewater, Edgerton, Milton, Evansville, Footville, Lake Lorraine, Orfordville, Hanover, Turtle Lake, Fulton and 1 more.
196 precincts · District lines: State senate lines: U.S. Census Bureau (1:500,000 cartographic boundary) · Precinct lines: Wisconsin Legislative Technology Services Bureau, statewide municipal ward collection (July 2026)
Results
Certified results for Wisconsin Senate District 15
State Senator District 15
Wisconsin General Election 11/08/2022 · Nov 8, 2022| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mark SpreitzerDemocrat | Democrat | 46,192 | 61.4% |
| Mark TrofimchuckRepublican | Republican | 29,006 | 38.6% |
Official certified results — Wisconsin Elections Commission, certified Nov. 30, 2022 · Wisconsin Elections Commission — official ward-by-ward canvass
The 2026 Field
Who else is running for Wisconsin Senate District 15
- Christopher DeanIndependent · On the 2026 ballot
- Scott FlemingRepublican · On the 2026 ballot
Not on file for Mark 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 Oct 3, 2026. Each item names its source. Record ID p_teyww7qcc.
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