Resident Population in Fleming County, KY was 15.44200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Fleming County, KY reached a record high of 15.44200 in January of 2023 and a record low of 11.36600 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Fleming County, KY - last updated from the United States Federal Reserve on May of 2024.