Dempster is an unincorporated community in Hamlin County, in the U.S. state of South Dakota. [1]
Dempster was platted in 1884. [2] It was named for William Dempster, who owned the town site. [2] A post office has been in operation in Dempster since 1884. [3]
44°37′55″N 96°57′06″W / 44.63194°N 96.95167°W