Resident Population in Johnson County, KY was 22.11600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Johnson County, KY reached a record high of 25.44400 in January of 1984 and a record low of 17.53900 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Johnson County, KY - last updated from the United States Federal Reserve on May of 2024.