Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Buchanan County, IA was 19666.00000 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 Buchanan County, IA reached a record high of 20420.00000 in January of 2010 and a record low of 19666.00000 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 Buchanan County, IA - last updated from the United States Federal Reserve on May of 2024.