Wisconsin's 12th Senate district
organization
The 12th Senate district of Wisconsin is one of 33 districts in the Wisconsin Senate. Located in northern Wisconsin, the district comprises Florence, Forest, Langlade, Lincoln, Marinette, Oneida, and Vilas counties, and parts of northern Oconto County, northwest Shawano County, and northeast Marathon County. It contains the cities of Antigo, Eagle River, Marinette, Merrill, Peshtigo, Rhinelander, and Tomahawk.
Current elected officials
Mary Felzkowski is the senator representing the 12th district. She was first elected in the 2020 general election. She previously served 8 years in the State Assembly.
Each Wisconsin State Senate district is composed of three Wisconsin State Assembly districts. The 12th Senate district comprises the 34th, 35th, and 36th Assembly districts. The current representatives of those districts are:
Assembly District 34: Rob Swearingen (R–Rhinelander)
Assembly District 35: Calvin Callahan (R–Tomahawk)
Assembly District 36: Jeffrey Mursau (R–Crivitz)
The 12th Senate district is split between two congressional districts. The portion of the district in Florence, Forest, Langlade, Oneida, Vilas, Lincoln, and Marathon counties falls within the Wisconsin's 7th congressional district, which is represented by U.S. Representative Tom Tiffany; the remainder of the district, which falls within Marinette, Oconto, Menominee, and Shawano counties, is in Wisconsin's 8th congressional district, which is represented by U.S. Representative Mike Gallagher.
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The record creator and administrative purpose are central evidence, because official documentation reflects both action and institutional priorities. The source revision retrieved here is dated Jun 5, 2026. The linked authority identifier is Q8027278. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2020.
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