Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in King County, WA was 144187.00000 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 King County, WA reached a record high of 144187.00000 in January of 2022 and a record low of 106596.00000 in January of 2009. 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 King County, WA - last updated from the United States Federal Reserve on May of 2024.