Resident Population in Colorado was 5957.49300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Colorado reached a record high of 5957.49300 in January of 2024 and a record low of 543.00000 in January of 1900. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Colorado - last updated from the United States Federal Reserve on September of 2025.