The 39th Assembly District of Wisconsin is one of 99 districts in the Wisconsin State Assembly. Located in east-central Wisconsin, the district comprises most of Dodge County and part of eastern Columbia County. It includes the cities of Beaver Dam, Horicon, Juneau, and Mayville, and the villages of Brownsville, Doylestown, Fall River, Hustisford, Iron Ridge, Kekoskee, Lomira, Neosho, and Theresa, and contains the Horicon Marsh State Wildlife Area. The district is represented by Republican Mark Born, since January 2013.