RANKING · 2000 CENSUS · 63 SHOWN OF 63

Fastest shrinking, Colorado counties · 2000

Colorado counties with the steepest population decline 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 growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS –

01San Juan County, COCO813-25.1%–

02Cheyenne County, COCO1,713-6.9%–

03Kiowa County, COCO1,412-3.9%–

04Jackson County, COCO1,211-1.7%–

05Baca County, COCO3,347-0.9%–

06Rio Blanco County, COCO6,683+0.2%–

07Otero County, COCO17,683+0.6%–

08Sedgwick County, COCO2,247+2.1%–

09Washington County, COCO4,732+2.4%–

10Phillips County, COCO4,420+6.9%–

11Prowers County, COCO11,884+8.5%–

12Yuma County, COCO9,896+9.9%–

13Alamosa County, COCO16,688+9.9%–

14Las Animas County, COCO14,391+10.5%–

15Kit Carson County, COCO7,069+12.2%–

16Conejos County, COCO7,529+12.7%–

17Costilla County, COCO3,679+14.8%–

18Pueblo County, COCO169,277+15.0%–

19Rio Grande County, COCO11,087+15.3%–

20Moffat County, COCO13,122+16.1%–

21Logan County, COCO20,654+16.7%–

22Pitkin County, COCO16,625+17.5%–

23Denver County, COCO740,613+18.6%–

24Bent County, COCO5,716+18.8%–

25Jefferson County, COCO580,451+20.2%–

26Clear Creek County, COCO8,994+22.4%–

27Dolores County, COCO2,466+22.6%–

28Morgan County, COCO30,306+23.8%–

29Arapahoe County, COCO673,820+24.6%–

30Mesa County, COCO162,845+24.8%–

31Montezuma County, COCO26,678+27.6%–

32Chaffee County, COCO20,831+28.1%–

33Saguache County, COCO6,732+28.1%–

34Boulder County, COCO328,560+29.3%–

35Lake County, COCO7,552+30.0%–

36El Paso County, COCO757,040+30.2%–

37Huerfano County, COCO7,011+30.8%–

38Delta County, COCO32,178+32.7%–

39Lincoln County, COCO5,645+34.4%–

40Larimer County, COCO377,292+35.1%–

41Gunnison County, COCO17,439+35.9%–

42La Plata County, COCO56,898+36.1%–

43Montrose County, COCO44,591+36.9%–

44Weld County, COCO378,426+37.3%–

45Adams County, COCO554,668+37.3%–

46Routt County, COCO25,329+39.8%–

47Crowley County, COCO5,677+39.8%–

48Fremont County, COCO50,039+43.0%–

49Garfield County, COCO63,474+46.1%–

50Mineral County, COCO910+48.9%–

51Gilpin County, COCO6,073+55.0%–

52Grand County, COCO16,496+56.2%–

53Ouray County, COCO5,265+63.1%–

54Teller County, COCO24,756+64.9%–

55Hinsdale County, COCO753+69.2%–

56San Miguel County, COCO7,753+80.5%–

57Custer County, COCO5,590+81.9%–

58Summit County, COCO31,517+82.8%–

59Archuleta County, COCO14,306+85.2%–

60Eagle County, COCO54,291+90.0%–

61Park County, COCO18,314+102.4%–

62Elbert County, COCO30,534+106.0%–

63Douglas County, COCO399,396+191.0%–

SHOWING 1–63 OF 63

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