Resident Population in Clark County, KY was 37.67300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Clark County, KY reached a record high of 37.67300 in January of 2024 and a record low of 24.09000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Clark County, KY - last updated from the United States Federal Reserve on April of 2026.