Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Barnwell County, SC was 10276.00000 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 Barnwell County, SC reached a record high of 12182.00000 in January of 2009 and a record low of 10276.00000 in January of 2022. 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 Barnwell County, SC - last updated from the United States Federal Reserve on May of 2024.