Summerset is a city in Meade County, South Dakota, United States. The population was 2,972 at the 2020 census. Located in the western part of the state, it is the first city to incorporate in the state since 1985. Summerset was incorporated in an election that was held on June 7, 2005. Opponents of the city's dissolution insist a population of more than one thousand, despite the formal pre-incorporation census indicating 597 residents.