Get to know Mountain Plains
The practical stuff — trash day, town hall, schools — plus the town’s story and where to go. Kept current by neighbors.
The basics
About Mountain Plains
Census-designated place in South Dakota, United StatesMountain Plains is an unincorporated area and census-designated place (CDP) in Lawrence County, South Dakota, United States. The population was 327 at the 2020 census. It was first listed as a CDP prior to the 2020 census. It is in the northern part of the county, on the northern edge of the Black Hills. It is bordered to the north by the city of Spearfish. U.S. Route 14A forms the eastern edge of the CDP, following the canyon of Spearfish Creek.
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