Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Arapahoe County, CO was 377947.00000 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 Arapahoe County, CO reached a record high of 388556.00000 in January of 2019 and a record low of 357351.00000 in January of 2010. 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 Arapahoe County, CO - last updated from the United States Federal Reserve on May of 2024.