South Dakota's 5th legislative district is one of 35 districts in the South Dakota Legislature. Each district is represented by 1 senator and 2 representatives. In the Senate, it has been represented by Republican Glen Vilhauer since 2025. In the House, it has been represented by Republicans Matt Roby and Josephine Garcia since 2025.
The district is located within the city of Watertown in Codington County, located in northeastern South Dakota. The district is completely surrounded by the 4th district.
South Dakota legislators are elected to two-year terms, with each permitted to serve a maximum of four consecutive two-year terms. Elections are held every even-numbered year.