All-Transactions House Price Index for Washington County, IL was 182.65000 Index 2000=100 in January of 2023, according to the United States Federal Reserve. Historically, All-Transactions House Price Index for Washington County, IL reached a record high of 182.65000 in January of 2023 and a record low of 75.78000 in January of 1994. Trading Economics provides the current actual value, an historical data chart and related indicators for All-Transactions House Price Index for Washington County, IL - last updated from the United States Federal Reserve on May of 2024.