Unemployment Rate in King County, WA was 4.20% in February of 2024, according to the United States Federal Reserve. Historically, Unemployment Rate in King County, WA reached a record high of 15.00 in April of 2020 and a record low of 2.00 in November of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in King County, WA - last updated from the United States Federal Reserve on May of 2024.