Wisconsin's 13th Senate district

The 13th Senate District of Wisconsin is one of 33 districts in the Wisconsin Senate. Located in south central Wisconsin, the district comprises all of Green Lake and Marquette counties, along with most of Dodge County, western Fond du Lac County, and parts of northern Jefferson County, eastern Adams County, northeast Columbia County, and southwest Winnebago County. It includes the cities of Beaver Dam, Horicon, Markesan, Mayville, Montello, Princeton, Ripon, Watertown, and Waupun.

Current elected officials
John Jagler is the senator representing the 13th district. He was first elected in a 2021 special election. He previously served 8 years in the State Assembly.

Each Wisconsin State Senate district is composed of three Wisconsin State Assembly districts. The 13th Senate district comprises the 37th, 38th, and 39th Assembly districts. The current representatives of those districts are:
 * Assembly District 37: William Penterman (R–Columbus)
 * Assembly District 38: Barbara Dittrich (R–Oconomowoc)
 * Assembly District 39: Mark Born (R–Beaver Dam)

The 13th Senate district, in its current borders, crosses three different congressional districts. The part of the district in Adams County falls within Wisconsin's 3rd congressional district, represented by U.S. Representative Derrick Van Orden. The parts of the district in Jefferson County and the southern half of Dodge County fall within Wisconsin's 5th congressional district, represented by Scott L. Fitzgerald. All of the remainder falls within Wisconsin's 6th congressional district, represented by Glenn Grothman.

Past senators
The district has previously been represented by:

Note: the boundaries of districts have changed repeatedly over history. Previous politicians of a specific numbered district have represented a completely different geographic area, due to redistricting.