Resident Population in Madison County, KY was 99.58200 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Madison County, KY reached a record high of 99.58200 in January of 2024 and a record low of 42.73000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Madison County, KY - last updated from the United States Federal Reserve on April of 2026.