Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Sully County, SD was 1214.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Sully County, SD reached a record high of 1444.00000 in January of 2016 and a record low of 1190.00000 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Sully County, SD - last updated from the United States Federal Reserve on May of 2024.