Per Capita Personal Income in Williamson County, IL was 51821.00000 $ in January of 2022, according to the United States Federal Reserve. Historically, Per Capita Personal Income in Williamson County, IL reached a record high of 52165.00000 in January of 2021 and a record low of 3131.00000 in January of 1969. Trading Economics provides the current actual value, an historical data chart and related indicators for Per Capita Personal Income in Williamson County, IL - last updated from the United States Federal Reserve on May of 2024.