All-Transactions House Price Index for St. Clair County, IL was 175.23000 Index 2000=100 in January of 2023, according to the United States Federal Reserve. Historically, All-Transactions House Price Index for St. Clair County, IL reached a record high of 175.23000 in January of 2023 and a record low of 47.87000 in January of 1977. Trading Economics provides the current actual value, an historical data chart and related indicators for All-Transactions House Price Index for St. Clair County, IL - last updated from the United States Federal Reserve on May of 2024.