Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Marion County, SC was 16435.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Marion County, SC reached a record high of 18940.00000 in January of 2010 and a record low of 16435.00000 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, Black or African American Alone (5-year estimate) in Marion County, SC - last updated from the United States Federal Reserve on May of 2024.