Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Jefferson County, IA was 13130.00000 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, IA reached a record high of 14702.00000 in January of 2020 and a record low of 12746.00000 in January of 2021. 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, IA - last updated from the United States Federal Reserve on May of 2024.