Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Union County, MS was 4520.00000 Persons in January of 2023, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Union County, MS reached a record high of 4714.00000 in January of 2020 and a record low of 3704.00000 in January of 2012. 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 Union County, MS - last updated from the United States Federal Reserve on September of 2025.