Fastest growing counties in Colorado.
County | Rank | Change (2020) | 2024 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Custer County | 1 | 21.34% | 5,731 | 4,723 |
| Elbert County | 2 | 13.56% | 29,770 | 26,216 |
| San Juan County | 3 | 12.24% | 798 | 711 |
| Weld County | 4 | 11.21% | 368,618 | 331,458 |
| Dolores County | 5 | 10.08% | 2,566 | 2,331 |
| Mineral County | 6 | 9.5% | 957 | 874 |
| Douglas County | 7 | 8.76% | 391,875 | 360,323 |
| Bent County | 8 | 8.22% | 5,923 | 5,473 |
| Chaffee County | 9 | 7.62% | 20,969 | 19,484 |
| Ouray County | 10 | 7.52% | 5,249 | 4,882 |
| Archuleta County | 11 | 7.19% | 14,389 | 13,424 |
| Saguache County | 12 | 5.63% | 6,749 | 6,389 |
| Park County | 13 | 5.14% | 18,313 | 17,418 |
| Fremont County | 14 | 4.38% | 51,020 | 48,878 |
| Broomfield County | 15 | 4.07% | 77,525 | 74,490 |
| Costilla County | 16 | 3.97% | 3,641 | 3,502 |
| Montrose County | 17 | 3.94% | 44,505 | 42,818 |
| Larimer County | 18 | 3.9% | 373,965 | 359,923 |
| Adams County | 19 | 3.6% | 539,221 | 520,500 |
| Mesa County | 20 | 3.09% | 160,831 | 156,011 |
| Delta County | 21 | 2.82% | 31,932 | 31,056 |
| Montezuma County | 22 | 2.73% | 26,595 | 25,887 |
| Huerfano County | 23 | 2.72% | 7,013 | 6,827 |
| Gilpin County | 24 | 2.51% | 5,966 | 5,820 |
| Grand County | 25 | 2.47% | 16,136 | 15,747 |
| Morgan County | 26 | 2.43% | 29,782 | 29,076 |
| Garfield County | 27 | 2.21% | 63,158 | 61,794 |
| Gunnison County | 28 | 2.19% | 17,322 | 16,950 |
| Alamosa County | 29 | 2.11% | 16,723 | 16,377 |
| El Paso County | 30 | 2.11% | 747,834 | 732,384 |
| Moffat County | 31 | 1.36% | 13,449 | 13,269 |
| Rio Blanco County | 32 | 1.06% | 6,589 | 6,520 |
| La Plata County | 33 | 1.06% | 56,261 | 55,673 |
| Washington County | 34 | 1.04% | 4,863 | 4,813 |
| Routt County | 35 | 0.9% | 25,056 | 24,832 |
| Pueblo County | 36 | 0.61% | 169,372 | 168,337 |
| Denver County | 37 | 0.29% | 719,701 | 717,606 |
| Arapahoe County | 38 | 0.09% | 655,853 | 655,272 |
| Conejos County | 39 | 0.05% | 7,455 | 7,451 |
| Lake County | 40 | -0.32% | 7,384 | 7,408 |
| Phillips County | 41 | -0.51% | 4,504 | 4,527 |
| Las Animas County | 42 | -0.72% | 14,385 | 14,490 |
| Crowley County | 43 | -0.76% | 5,645 | 5,688 |
| Kit Carson County | 44 | -0.81% | 7,005 | 7,062 |
| Jefferson County | 45 | -1.06% | 576,921 | 583,081 |
| Cheyenne County | 46 | -1.32% | 1,723 | 1,746 |
| Boulder County | 47 | -1.39% | 326,323 | 330,938 |
| Yuma County | 48 | -1.42% | 9,829 | 9,971 |
| Teller County | 49 | -1.5% | 24,374 | 24,744 |
| Summit County | 50 | -2.28% | 30,294 | 31,001 |
| Sedgwick County | 51 | -3.22% | 2,312 | 2,389 |
| Prowers County | 52 | -3.23% | 11,629 | 12,017 |
| Logan County | 53 | -3.6% | 20,446 | 21,210 |
| Hinsdale County | 54 | -3.68% | 759 | 788 |
| Lincoln County | 55 | -3.74% | 5,450 | 5,662 |
| Otero County | 56 | -3.77% | 17,961 | 18,664 |
| Eagle County | 57 | -3.8% | 53,544 | 55,657 |
| San Miguel County | 58 | -4.05% | 7,728 | 8,054 |
| Rio Grande County | 59 | -4.35% | 11,039 | 11,541 |
| Clear Creek County | 60 | -4.96% | 8,927 | 9,393 |
| Pitkin County | 61 | -5.31% | 16,433 | 17,355 |
| Jackson County | 62 | -5.44% | 1,304 | 1,379 |
| Baca County | 63 | -6.52% | 3,253 | 3,480 |
| Kiowa County | 64 | -8.32% | 1,334 | 1,455 |