Resident Population in Gallatin County, KY was 8.80500 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Gallatin County, KY reached a record high of 8.84200 in January of 2019 and a record low of 4.13400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Gallatin County, KY - last updated from the United States Federal Reserve on April of 2026.