Estimated Percent of Related Children Age 5-17 in Families in Poverty for King County, WA was 9.30% in January of 2022, according to the United States Federal Reserve. Historically, Estimated Percent of Related Children Age 5-17 in Families in Poverty for King County, WA reached a record high of 15.10 in January of 2013 and a record low of 7.60 in January of 2000. Trading Economics provides the current actual value, an historical data chart and related indicators for Estimated Percent of Related Children Age 5-17 in Families in Poverty for King County, WA - last updated from the United States Federal Reserve on May of 2024.