Estimate of Median Household Income for King County, WA was 121984.00000 $ in January of 2024, according to the United States Federal Reserve. Historically, Estimate of Median Household Income for King County, WA reached a record high of 121984.00000 in January of 2024 and a record low of 37030.00000 in January of 1989. Trading Economics provides the current actual value, an historical data chart and related indicators for Estimate of Median Household Income for King County, WA - last updated from the United States Federal Reserve on April of 2026.