Resident Population in Ohio County, KY was 23.93300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Ohio County, KY reached a record high of 24.20200 in January of 2016 and a record low of 18.79000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Ohio County, KY - last updated from the United States Federal Reserve on April of 2026.