South Dakota's 7th 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 Tim Reed since 2023. In the House, it has been represented by Republicans Mellissa Heermann and Roger DeGroot since 2023.
The district is based in and around Brookings, the state's fourth-largest city, in eastern South Dakota.
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.