Resident Population in Butler County, KY was 12.37500 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Butler County, KY reached a record high of 13.38100 in January of 2006 and a record low of 9.72300 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Butler County, KY - last updated from the United States Federal Reserve on May of 2024.