Regional Price Parities: All Items for Illinois was 101.25700 Index in January of 2022, according to the United States Federal Reserve. Historically, Regional Price Parities: All Items for Illinois reached a record high of 102.13600 in January of 2011 and a record low of 99.15500 in January of 2015. Trading Economics provides the current actual value, an historical data chart and related indicators for Regional Price Parities: All Items for Illinois - last updated from the United States Federal Reserve on April of 2024.