South St. Paul is a city in Dakota County, Minnesota, immediately south and southeast of Saint Paul, Minnesota. It is also east of West St. Paul, Minnesota. The population was 20,160 at the 2010 census. Historically, the town was notable as a major meat-packing location. Subsequently, many residents are descended from immigrants of Southern European and Eastern European heritage, who came to work in the meat-packing plants in the early twentieth century.
A post office called "South St. Paul" has been in operation since 1888. The city was named based on its location, south of St. Paul, MN.