Unemployment Rate in King County, TX was 2.10% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in King County, TX reached a record high of 9.80 in February of 1998 and a record low of 0.90 in March of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in King County, TX - last updated from the United States Federal Reserve on April of 2026.