Wisconsin's 40th Assembly district

Wisconsin's 40th
State Assembly district

2024 map defined in 2023 Wisc. Act 94
2022 map defined in Johnson v. Wisconsin Elections Commission
2011 map was defined in 2011 Wisc. Act 43
Assemblymember
  Karen DeSanto
DBaraboo
since January 6, 2025 (0 years)
Demographics90.56% White
2.1% Black
3.83% Hispanic
0.94% Asian
1.74% Native American
0.08% Hawaiian/Pacific Islander
Population (2020)
  Voting age
59,478
47,068
WebsiteOfficial website
NotesCentral Wisconsin

The 40th Assembly district of Wisconsin is one of 99 districts in the Wisconsin State Assembly. Located in central Wisconsin, the district comprises parts of northern Columbia County and eastern and southern Sauk County. It includes the cities of Baraboo, Portage, Prairie du Sac, and Sauk City, and the villages of Merrimac, Pardeeville, Plain, Spring Green, and West Baraboo. The district also contains Devil's Lake State Park and Natural Bridge State Park. The district is represented by Democrat Karen DeSanto, since January 2025.

The 40th Assembly district is located within Wisconsin's 14th Senate district, along with the 41st and 42nd Assembly districts.