Resident Population in Leslie County, KY was 9.72900 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Leslie County, KY reached a record high of 15.17700 in January of 1983 and a record low of 9.72900 in January of 2024. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Leslie County, KY - last updated from the United States Federal Reserve on April of 2026.