Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in St. Croix County, WI was 614.00000 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 St. Croix County, WI reached a record high of 745.00000 in January of 2017 and a record low of 609.00000 in January of 2014. 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 St. Croix County, WI - last updated from the United States Federal Reserve on May of 2024.