RANKING · 2000 CENSUS · 63 SHOWN OF 63

Fastest growing, Colorado counties · 2000

Colorado counties ranked by population growth from the 1990 census to 2000. This list covers the 63 counties in Colorado that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS –

01Douglas County, COCO399,396+191.0%–

02Elbert County, COCO30,534+106.0%–

03Park County, COCO18,314+102.4%–

04Eagle County, COCO54,291+90.0%–

05Archuleta County, COCO14,306+85.2%–

06Summit County, COCO31,517+82.8%–

07Custer County, COCO5,590+81.9%–

08San Miguel County, COCO7,753+80.5%–

09Hinsdale County, COCO753+69.2%–

10Teller County, COCO24,756+64.9%–

11Ouray County, COCO5,265+63.1%–

12Grand County, COCO16,496+56.2%–

13Gilpin County, COCO6,073+55.0%–

14Mineral County, COCO910+48.9%–

15Garfield County, COCO63,474+46.1%–

16Fremont County, COCO50,039+43.0%–

17Crowley County, COCO5,677+39.8%–

18Routt County, COCO25,329+39.8%–

19Adams County, COCO554,668+37.3%–

20Weld County, COCO378,426+37.3%–

21Montrose County, COCO44,591+36.9%–

22La Plata County, COCO56,898+36.1%–

23Gunnison County, COCO17,439+35.9%–

24Larimer County, COCO377,292+35.1%–

25Lincoln County, COCO5,645+34.4%–

26Delta County, COCO32,178+32.7%–

27Huerfano County, COCO7,011+30.8%–

28El Paso County, COCO757,040+30.2%–

29Lake County, COCO7,552+30.0%–

30Boulder County, COCO328,560+29.3%–

31Saguache County, COCO6,732+28.1%–

32Chaffee County, COCO20,831+28.1%–

33Montezuma County, COCO26,678+27.6%–

34Mesa County, COCO162,845+24.8%–

35Arapahoe County, COCO673,820+24.6%–

36Morgan County, COCO30,306+23.8%–

37Dolores County, COCO2,466+22.6%–

38Clear Creek County, COCO8,994+22.4%–

39Jefferson County, COCO580,451+20.2%–

40Bent County, COCO5,716+18.8%–

41Denver County, COCO740,613+18.6%–

42Pitkin County, COCO16,625+17.5%–

43Logan County, COCO20,654+16.7%–

44Moffat County, COCO13,122+16.1%–

45Rio Grande County, COCO11,087+15.3%–

46Pueblo County, COCO169,277+15.0%–

47Costilla County, COCO3,679+14.8%–

48Conejos County, COCO7,529+12.7%–

49Kit Carson County, COCO7,069+12.2%–

50Las Animas County, COCO14,391+10.5%–

51Alamosa County, COCO16,688+9.9%–

52Yuma County, COCO9,896+9.9%–

53Prowers County, COCO11,884+8.5%–

54Phillips County, COCO4,420+6.9%–

55Washington County, COCO4,732+2.4%–

56Sedgwick County, COCO2,247+2.1%–

57Otero County, COCO17,683+0.6%–

58Rio Blanco County, COCO6,683+0.2%–

59Baca County, COCO3,347-0.9%–

60Jackson County, COCO1,211-1.7%–

61Kiowa County, COCO1,412-3.9%–

62Cheyenne County, COCO1,713-6.9%–

63San Juan County, COCO813-25.1%–

SHOWING 1–63 OF 63

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS