Resident Population in Roberts County, SD was 10.20600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Roberts County, SD reached a record high of 11.90000 in January of 1973 and a record low of 9.71800 in January of 1992. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Roberts County, SD - last updated from the United States Federal Reserve on May of 2024.