The estimated population of Colorado was 5,456,574 as of July 1, 2015 per U.S. Census Bureau. Based on population, Colorado is the 22nd largest U.S. state.
Colorado's rank number in the US by population is #22.
Colorado is the 8th largest US State.
Colorado is #8 in area and #22 in population.
It is the 8th largest US State.
Colorado is the 8th largest US State.
Colorado is the 8th largest US State.
Colorado is the 8th largest US State.
Alaska is the largest US State and ranks #47 in population.
Colorado is the 8th largest US State.
It is the 10th largest US State by Population.
It ranks as the 31st state in population in the US.