how many counties are in sd
See also: List of United States counties and county-equivalents. There are 66 counties in the U.S. state of South Dakota with FIPS codes. Todd County and Oglala Lakota County are the only counties in South Dakota which do not have their own county seats. Hot Springs in Fall River County serves as the administrative center for Oglala Lakota County. Winner in Tripp County serves as the administrative center for Todd County.