The 25th Senate District of Wisconsin is one of 33 districts in the Wisconsin State Senate. Located in northwest Wisconsin, the district comprises all of Ashland, Barron, Bayfield, Burnett, Douglas, Iron, Price, and Washburn counties, and part of northern Sawyer County. The 25th Senate district is the largest Wisconsin Senate district by area; mostly rural, the largest population center is the city of Superior. The district also includes the Bad River and Lac du Flambeau Indian reservations, and most of the Chequamegon–Nicolet National Forest.