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Senate District 12

Represented by Mary Felzkowski, a Republican, since January 2021. It holds three Assembly districts: Assembly District 34, Assembly District 35 and Assembly District 36.

Mary Felzkowski

State senator. Republican.

On the ballot

This seat is next on the ballot in November 2028.

In 2024, the race was decided by 35.1 points.

Their full record

Who has held this seat

From the Legislature's service records, which begin with the 2009 session. District lines were redrawn in 2011, 2022 and 2024, so the area this seat covers has changed over time.

  1. Mary Felzkowski Republican

    Jan 2021 to now

  2. Thomas Tiffany Republican

    Jan 2013 to Jan 2021

  3. Jim Holperin Democrat

    Jan 2009 to Dec 2012

Election results

Official general-election counts from the Wisconsin Elections Commission. Shares are of all votes cast, including write-ins. Results before 2024 are labeled with the maps they were held under, when this district number covered different ground.

November 2024

Mary Felzkowski, a REP, won with 67.5% of 109,936 votes cast.

Mary Felzkowski, REP: 74,162 67.5% Andi Rich, DEM: 35,628 32.4%

Boundaries from the Legislative Technology Services Bureau's 2024 maps. Results from the Wisconsin Elections Commission. Checked Sep 15, 2026.