About This Place
South Prairie is a town in Pierce County, Washington, United States. The population was 434 at the 2010 census.
South Prairie was platted in 1888 by Frank Bisson. It was named because of its location, south of Connell's and Porter's prairies. South Prairie was officially incorporated on February 17, 1909.
South Prairie is located at 47°8′18″N 122°5′49″W / 47.13833°N 122.09694°W / 47.13833; -122.09694 (47.138402, -122.096848).