state record · population
Population of Colorado
Colorado had an estimated population of 5,957,493 on July 1, 2024, according to the Census Bureau's Population Estimates Program.
What stands out
Colorado had an estimated population of 5,957,493 on July 1, 2024, according to the Census Bureau's Population Estimates Program. Since July 2020 that is +2.9 % (170,364 people); since 2010 it is +18.0 %. Migration is the larger driver since 2020: net migration +106,629 against a natural change (births minus deaths) of +63,073. Among the 51 states in the United States, it ranks 21 by population. Values for 2010–2019 and 2020–2024 come from two estimate vintages benchmarked to different censuses; the 2019→2020 step is partly a rebasing.
Population and components of change
July 1 estimates; components per estimate year (July–June).
Largest counties in Colorado
By latest estimate, with change since July 2020. Each links to the county's own population record.
| County | Population | Since 2020 |
|---|---|---|
| El Paso County | 752,772 | +2.6 % |
| Denver County | 729,019 | +1.6 % |
| Arapahoe County | 666,918 | +1.8 % |
| Jefferson County | 578,533 | -0.8 % |
| Adams County | 542,973 | +4.3 % |
| Douglas County | 393,995 | +9.3 % |
| Larimer County | 374,574 | +4.1 % |
| Weld County | 369,745 | +11.6 % |
| Boulder County | 330,262 | -0.2 % |
| Pueblo County | 169,866 | +0.9 % |
| Mesa County | 161,260 | +3.4 % |
| Broomfield County | 78,323 | +5.1 % |
| Garfield County | 63,167 | +2.2 % |
| La Plata County | 56,823 | +2.1 % |
| Eagle County | 54,330 | -2.4 % |
| Fremont County | 50,093 | +2.5 % |
| Montrose County | 44,806 | +4.6 % |
| Delta County | 32,215 | +3.7 % |
| Summit County | 30,882 | -1.1 % |
| Morgan County | 30,300 | +4.2 % |
| Elbert County | 29,382 | +12.1 % |
| Montezuma County | 26,841 | +3.7 % |
| Routt County | 25,243 | +1.6 % |
| Teller County | 24,862 | +0.5 % |
| Chaffee County | 20,780 | +6.6 % |
Largest cities and towns in Colorado
Incorporated places, latest estimate. The Census Bureau publishes totals only for places, no components.
| Place | Population | Since 2020 |
|---|---|---|
| Denver city | 729,019 | +1.6 % |
| Colorado Springs city | 493,554 | +2.5 % |
| Aurora city | 403,130 | +4.2 % |
| Fort Collins city | 170,924 | +0.6 % |
| Lakewood city | 156,868 | +0.4 % |
| Thornton city | 146,689 | +3.2 % |
| Arvada city | 121,873 | -2.0 % |
| Westminster city | 115,302 | -1.2 % |
| Greeley city | 114,363 | +4.6 % |
| Pueblo city | 111,166 | -0.7 % |
| Centennial city | 108,853 | +0.6 % |
| Boulder city | 106,803 | -1.5 % |
| Longmont city | 99,818 | +0.6 % |
| Castle Rock town | 83,213 | +12.6 % |
| Loveland city | 81,102 | +6.2 % |
| Broomfield city | 78,323 | +5.1 % |
| Grand Junction city | 70,554 | +7.3 % |
| Commerce City city | 70,245 | +11.9 % |
| Parker town | 65,473 | +11.2 % |
| Littleton city | 44,879 | -1.6 % |
| Brighton city | 43,473 | +7.9 % |
| Windsor town | 41,734 | +25.6 % |
| Erie town | 38,594 | +26.9 % |
| Northglenn city | 38,287 | +0.6 % |
| Englewood city | 35,238 | +4.8 % |
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