RANKING · 2000 CENSUS · 63 SHOWN OF 63

Youngest by median age, Colorado counties · 2000

Colorado counties with the youngest median age (2023 ACS). This list covers the 63 counties in Colorado that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDOldest by median age Most foreign-born residents Highest uninsured rate Most women Most men Highest disability rate

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Gunnison County, COCO17,43930.4+0%

02Lake County, COCO7,55230.5+0%

03Alamosa County, COCO16,68830.6+0%

04Summit County, COCO31,51730.8+0%

05Weld County, COCO378,42630.9+0%

06Eagle County, COCO54,29131.2+0%

07Adams County, COCO554,66831.4+0%

08Prowers County, COCO11,88432.4+0%

09El Paso County, COCO757,04033.0+0%

10Denver County, COCO740,61333.1+0%

11Larimer County, COCO377,29233.2+0%

12Boulder County, COCO328,56033.4+0%

13Morgan County, COCO30,30633.5+0%

14Douglas County, COCO399,39633.7+0%

15Conejos County, COCO7,52934.2+0%

16Garfield County, COCO63,47434.2+0%

17San Miguel County, COCO7,75334.2+0%

18Arapahoe County, COCO673,82034.5+0%

19Routt County, COCO25,32935.0+0%

20Moffat County, COCO13,12235.4+0%

21La Plata County, COCO56,89835.6+0%

22Logan County, COCO20,65436.5+0%

23Crowley County, COCO5,67736.6+0%

24Pueblo County, COCO169,27736.7+0%

25Jefferson County, COCO580,45136.8+0%

26Grand County, COCO16,49636.9+0%

27Saguache County, COCO6,73236.9+0%

28Elbert County, COCO30,53437.2+0%

29Bent County, COCO5,71637.3+0%

30Rio Grande County, COCO11,08737.3+0%

31Yuma County, COCO9,89637.3+0%

32Kit Carson County, COCO7,06937.4+0%

33Rio Blanco County, COCO6,68337.5+0%

34Otero County, COCO17,68337.7+0%

35Lincoln County, COCO5,64537.8+0%

36Cheyenne County, COCO1,71337.9+0%

37Montezuma County, COCO26,67838.0+0%

38Mesa County, COCO162,84538.1+0%

39Gilpin County, COCO6,07338.3+0%

40Pitkin County, COCO16,62538.4+0%

41Montrose County, COCO44,59138.8+0%

42Fremont County, COCO50,03938.8+0%

43Teller County, COCO24,75639.4+0%

44Kiowa County, COCO1,41239.7+0%

45Phillips County, COCO4,42039.8+0%

46Park County, COCO18,31440.0+0%

47Clear Creek County, COCO8,99440.2+0%

48Washington County, COCO4,73240.2+0%

49Jackson County, COCO1,21140.5+0%

50Archuleta County, COCO14,30640.8+0%

51Las Animas County, COCO14,39140.9+0%

52Huerfano County, COCO7,01141.7+0%

53Chaffee County, COCO20,83141.8+0%

54Costilla County, COCO3,67942.1+0%

55Delta County, COCO32,17842.3+0%

56Dolores County, COCO2,46642.4+0%

57Baca County, COCO3,34742.9+0%

58Sedgwick County, COCO2,24743.2+0%

59Ouray County, COCO5,26543.4+0%

60San Juan County, COCO81343.7+0%

61Hinsdale County, COCO75343.9+0%

62Custer County, COCO5,59044.9+0%

63Mineral County, COCO91045.0+0%

SHOWING 1–63 OF 63

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES