Resident Population in Barren County, KY was 45.60900 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Barren County, KY reached a record high of 45.60900 in January of 2024 and a record low of 28.67700 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Barren County, KY - last updated from the United States Federal Reserve on April of 2026.