Colorado Demographics
Colorado is the 21st most populous of 52 states in the United States, with 5,773,603 residents across 103,637 square miles. That is about 56 people per square mile. 86% of residents live in urban areas.
At the 2020 census
| Population | 5,773,603 |
|---|---|
| Land area | 103,637 sq mi |
| Density | 56 / sq mi |
| Urban share | 86% |
Data: 2020 Census · American Community Survey 2024
How Colorado compares to the US
We're computing this state's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Colorado
Measured from the state's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Colorado — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Counties in Colorado
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| El Paso County | 730,395 | 2,126.4 | 343 |
| Denver County | 715,509 | 153.1 | 4,674 |
| Arapahoe County | 655,097 | 797.9 | 821 |
| Jefferson County | 582,897 | 764.4 | 763 |
| Adams County | 519,571 | 1,166.7 | 445 |
| Larimer County | 359,066 | 2,595.7 | 138 |
| Douglas County | 357,978 | 840.9 | 426 |
| Boulder County | 330,758 | 726.4 | 455 |
| Weld County | 328,968 | 3,985.0 | 83 |
| Pueblo County | 168,162 | 2,386.6 | 70 |
| Mesa County | 155,703 | 3,328.7 | 47 |
| Broomfield County | 74,125 | 33.0 | 2,248 |
| Garfield County | 61,685 | 2,947.4 | 21 |
| Eagle County | 55,731 | 1,684.5 | 33 |
| La Plata County | 55,638 | 1,689.7 | 33 |
| Fremont County | 48,939 | 1,533.8 | 32 |
| Montrose County | 42,679 | 2,240.9 | 19 |
| Delta County | 31,196 | 1,142.1 | 27 |
| Summit County | 31,055 | 608.3 | 51 |
| Morgan County | 29,111 | 1,280.5 | 23 |
| Elbert County | 26,062 | 1,850.1 | 14 |
| Montezuma County | 25,849 | 2,029.3 | 13 |
| Routt County | 24,829 | 2,362.0 | 11 |
| Teller County | 24,710 | 557.1 | 44 |
| Logan County | 21,528 | 1,838.6 | 12 |
| Chaffee County | 19,476 | 1,013.4 | 19 |
| Otero County | 18,690 | 1,261.9 | 15 |
| Park County | 17,390 | 2,193.5 | 8 |
| Pitkin County | 17,358 | 970.7 | 18 |
| Gunnison County | 16,918 | 3,239.1 | 5 |
| Alamosa County | 16,376 | 722.6 | 23 |
| Grand County | 15,717 | 1,846.4 | 9 |
| Las Animas County | 14,555 | 4,772.9 | 3 |
| Archuleta County | 13,359 | 1,350.1 | 10 |
| Moffat County | 13,292 | 4,743.2 | 3 |
| Prowers County | 11,999 | 1,638.4 | 7 |
| Rio Grande County | 11,539 | 912.0 | 13 |
| Yuma County | 9,988 | 2,364.4 | 4 |
| Clear Creek County | 9,397 | 395.1 | 24 |
| San Miguel County | 8,072 | 1,286.7 | 6 |
| Conejos County | 7,461 | 1,287.4 | 6 |
| Lake County | 7,436 | 376.9 | 20 |
| Kit Carson County | 7,087 | 2,160.8 | 3 |
| Huerfano County | 6,820 | 1,591.0 | 4 |
| Rio Blanco County | 6,529 | 3,221.0 | 2 |
| Saguache County | 6,368 | 3,168.6 | 2 |
| Crowley County | 5,922 | 787.4 | 8 |
| Gilpin County | 5,808 | 150.0 | 39 |
| Lincoln County | 5,675 | 2,577.7 | 2 |
| Bent County | 5,650 | 1,512.8 | 4 |
| Ouray County | 4,874 | 540.7 | 9 |
| Washington County | 4,817 | 2,518.1 | 2 |
| Custer County | 4,704 | 738.6 | 6 |
| Phillips County | 4,530 | 687.9 | 7 |
| Baca County | 3,506 | 2,555.0 | 1 |
| Costilla County | 3,499 | 1,227.6 | 3 |
| Sedgwick County | 2,404 | 548.0 | 4 |
| Dolores County | 2,326 | 1,067.2 | 2 |
| Cheyenne County | 1,748 | 1,778.3 | 1 |
| Kiowa County | 1,446 | 1,767.8 | 1 |
| Jackson County | 1,379 | 1,613.7 | 1 |
| Mineral County | 865 | 875.8 | 1 |
| Hinsdale County | 788 | 1,117.2 | 1 |
| San Juan County | 705 | 387.5 | 2 |
Largest cities in Colorado
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Denver, CO | 715,478 | 153.1 | 4,674 |
| Colorado Springs, CO | 479,001 | 201.8 | 2,373 |
| Aurora, CO | 386,288 | 162.5 | 2,377 |
| Fort Collins, CO | 169,831 | 57.0 | 2,977 |
| Lakewood, CO | 155,884 | 43.5 | 3,587 |
| Thornton, CO | 141,897 | 36.5 | 3,888 |
| Arvada, CO | 124,457 | 39.0 | 3,193 |
| Westminster, CO | 116,358 | 31.6 | 3,684 |
| Pueblo, CO | 111,828 | 56.2 | 1,990 |
| Greeley, CO | 108,825 | 49.4 | 2,202 |
| Centennial, CO | 108,416 | 29.7 | 3,645 |
| Boulder, CO | 108,324 | 26.8 | 4,040 |
Showing the 12 most populous of 482 — the rest are shown on the map.
Related places
Nearest states
About this page
This page shows demographics for a US state from the 2020 census and the American Community Survey: population, land area, density, and how the state compares to national averages for income, housing, age, and more.
Use the links below to drill into the state's counties and largest cities, or open any point of the state in the radius tool to measure the population within a distance or drive time.