Resident Population in Charles Mix County, SD was 9.24000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Charles Mix County, SD reached a record high of 10.20000 in January of 1975 and a record low of 8.93000 in January of 2008. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Charles Mix County, SD - last updated from the United States Federal Reserve on May of 2024.