Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Rock County, WI was 7485.00000 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 Rock County, WI reached a record high of 7853.00000 in January of 2010 and a record low of 5481.00000 in January of 2016. 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 Rock County, WI - last updated from the United States Federal Reserve on May of 2024.