Estimated Percent of Related Children Age 5-17 in Families in Poverty for Williamson County, IL was 16.20% 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 Williamson County, IL reached a record high of 24.70 in January of 2009 and a record low of 16.20 in January of 2022. 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 Williamson County, IL - last updated from the United States Federal Reserve on May of 2024.