Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Jefferson County, MO was 204792.00000 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 Jefferson County, MO reached a record high of 211428.00000 in January of 2019 and a record low of 204792.00000 in January of 2022. 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 Jefferson County, MO - last updated from the United States Federal Reserve on May of 2024.