Area: 1,740 sq. mi.
Seat: Hot Springs
Fall River County organized as a county in Dakota Territory in November 1883 and Hot Springs was chosen as the county seat. The county was once known as Forsythe County.
Fall River County also operates as the administrative center for Oglala Lakota County services. For more information on Oglala Lakota County visit their website at oglalalakota.sdcounties.org