Resident Population in Lincoln County, SD was 73.23800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Lincoln County, SD reached a record high of 73.23800 in January of 2023 and a record low of 11.60000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Lincoln County, SD - last updated from the United States Federal Reserve on May of 2024.