Resident Population in Lewis County, KY was 12.97300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Lewis County, KY reached a record high of 14.65800 in January of 1981 and a record low of 12.35500 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Lewis County, KY - last updated from the United States Federal Reserve on May of 2024.