Leading Index for Illinois was 2.43% in February of 2020, according to the United States Federal Reserve. Historically, Leading Index for Illinois reached a record high of 4.57 in May of 1983 and a record low of -4.60 in March of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Leading Index for Illinois - last updated from the United States Federal Reserve on April of 2024.