Folsom is an unincorporated community in Custer County, in the U.S. state of South Dakota. [1]
A post office called Folsom was established in 1886, and remained in operation until 1948. [2] The community was named after Frances Folsom Cleveland, First Lady of the United States. [3]
43°49′31″N 102°52′12″W / 43.82528°N 102.87000°W