Resident Population in McLean County, KY was 9.12600 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in McLean County, KY reached a record high of 10.40000 in January of 1978 and a record low of 9.06200 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in McLean County, KY - last updated from the United States Federal Reserve on April of 2026.