RANKING · 2010 CENSUS · 64 SHOWN OF 64

Youngest by median age, Colorado counties · 2010

Colorado counties with the youngest median age (2023 ACS). This list covers the 64 counties in Colorado that qualify, ranked against each other statewide.

Flip the list · Oldest by median age, US counties →

ColoradoAll states All rankings

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

01Adams County, COCO554,66832.4+3%

02Alamosa County, COCO16,68832.9+8%

03Weld County, COCO378,42633.1+7%

04Denver County, COCO740,61333.7+2%

05Eagle County, COCO54,29134.0+9%

06El Paso County, COCO757,04034.1+3%

07Gunnison County, COCO17,43934.3+13%

08Garfield County, COCO63,47434.5+1%

09Lake County, COCO7,55235.0+15%

10Larimer County, COCO377,29235.5+7%

11Arapahoe County, COCO673,82035.7+3%

12Boulder County, COCO328,56035.8+7%

13Moffat County, COCO13,12235.8+1%

14Morgan County, COCO30,30636.0+7%

15Broomfield County, COCO79,17436.4–

16Summit County, COCO31,51736.4+18%

17Douglas County, COCO399,39636.6+9%

18Prowers County, COCO11,88436.7+13%

19Rio Blanco County, COCO6,68338.0+1%

20Mesa County, COCO162,84538.1+0%

21Conejos County, COCO7,52938.2+12%

22La Plata County, COCO56,89838.4+8%

23Logan County, COCO20,65438.4+5%

24Yuma County, COCO9,89638.5+3%

25Pueblo County, COCO169,27738.7+5%

26Crowley County, COCO5,67738.9+6%

27Routt County, COCO25,32938.9+11%

28San Miguel County, COCO7,75339.3+15%

29Kit Carson County, COCO7,06939.7+6%

30Bent County, COCO5,71639.8+7%

31Jefferson County, COCO580,45140.4+10%

32Lincoln County, COCO5,64540.9+8%

33Otero County, COCO17,68340.9+8%

34Rio Grande County, COCO11,08741.0+10%

35Grand County, COCO16,49641.2+12%

36Montrose County, COCO44,59142.0+8%

37Pitkin County, COCO16,62542.0+9%

38Cheyenne County, COCO1,71342.7+13%

39Phillips County, COCO4,42042.8+8%

40Montezuma County, COCO26,67842.9+13%

41Saguache County, COCO6,73243.3+17%

42Fremont County, COCO50,03943.6+12%

43Elbert County, COCO30,53443.8+18%

44San Juan County, COCO81343.8+0%

45Las Animas County, COCO14,39143.9+7%

46Washington County, COCO4,73244.2+10%

47Dolores County, COCO2,46644.7+5%

48Delta County, COCO32,17845.6+8%

49Gilpin County, COCO6,07345.6+19%

50Clear Creek County, COCO8,99446.6+16%

51Park County, COCO18,31446.9+17%

52Teller County, COCO24,75647.0+19%

53Hinsdale County, COCO75347.1+7%

54Jackson County, COCO1,21147.3+17%

55Baca County, COCO3,34747.4+10%

56Chaffee County, COCO20,83147.4+13%

57Kiowa County, COCO1,41247.4+19%

58Archuleta County, COCO14,30648.4+19%

59Costilla County, COCO3,67949.0+16%

60Sedgwick County, COCO2,24749.2+14%

61Ouray County, COCO5,26550.0+15%

62Huerfano County, COCO7,01151.8+24%

63Mineral County, COCO91053.1+18%

64Custer County, COCO5,59053.3+19%

SHOWING 1–64 OF 64

Download CSV (full list, 64 rows)

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