Income Inequality in King County, WA was 16.56940 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in King County, WA reached a record high of 16.56940 in January of 2022 and a record low of 14.14095 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in King County, WA - last updated from the United States Federal Reserve on May of 2024.