All-Transactions House Price Index for Illinois was 543.65000 Index 1980 Q1=100 in July of 2025, according to the United States Federal Reserve. Historically, All-Transactions House Price Index for Illinois reached a record high of 543.65000 in July of 2025 and a record low of 62.25000 in April of 1975. Trading Economics provides the current actual value, an historical data chart and related indicators for All-Transactions House Price Index for Illinois - last updated from the United States Federal Reserve on February of 2026.