Colorado Population 2024 Map. Colorado has a land area of 103,610.1 square miles and a water area of 457.3 square miles. The population of colorado in 2020 was 5,785,219, a 0.46% increase from 2019.
The most populous cities in colorado are denver with 716,577, colorado springs at 488,664, aurora with 395,052, fort collins at 170,376, and lakewood. Population forecast series are available at the state, regional, and county levels.