Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Mercer County, KY was 20467.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Mercer County, KY reached a record high of 20467.00000 in January of 2022 and a record low of 19487.00000 in January of 2017. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Mercer County, KY - last updated from the United States Federal Reserve on May of 2024.