Resident Population in Nicholas County, KY was 7.81600 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Nicholas County, KY reached a record high of 7.81600 in January of 2024 and a record low of 6.40000 in January of 1972. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Nicholas County, KY - last updated from the United States Federal Reserve on April of 2026.