RANKING · 2024 ACS · 64 SHOWN OF 64

Oldest by median age, Colorado counties

Colorado counties ranked by median age of residents (2024 ACS). This list covers the 64 counties in Colorado that qualify, ranked against each other statewide.

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

ColoradoAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Custer County, COCO5,59058.2+30%

02Dolores County, COCO2,46656.7+34%

03Mineral County, COCO91056.4+25%

04Ouray County, COCO5,26555.4+28%

05Huerfano County, COCO7,01155.3+33%

06Teller County, COCO24,75652.2+32%

07Archuleta County, COCO14,30652.1+28%

08Jackson County, COCO1,21151.6+27%

09Park County, COCO18,31451.2+28%

10Costilla County, COCO3,67950.5+20%

11Saguache County, COCO6,73249.6+34%

12Clear Creek County, COCO8,99449.1+22%

13Chaffee County, COCO20,83148.7+17%

14Hinsdale County, COCO75348.5+10%

15Delta County, COCO32,17848.1+14%

16Gilpin County, COCO6,07347.2+23%

17Pitkin County, COCO16,62547.2+23%

18Las Animas County, COCO14,39146.6+14%

19Montrose County, COCO44,59146.1+19%

20Grand County, COCO16,49645.4+23%

21Kiowa County, COCO1,41245.4+14%

22Elbert County, COCO30,53445.0+21%

23Fremont County, COCO50,03944.7+15%

24Montezuma County, COCO26,67844.5+17%

25Routt County, COCO25,32943.4+24%

26San Miguel County, COCO7,75343.3+27%

27La Plata County, COCO56,89843.2+21%

28Baca County, COCO3,34743.0+0%

29Cheyenne County, COCO1,71342.9+13%

30Sedgwick County, COCO2,24742.6−1%

31Otero County, COCO17,68341.8+11%

32Rio Grande County, COCO11,08741.7+12%

33Mesa County, COCO162,84541.3+8%

34Washington County, COCO4,73241.3+3%

35Lincoln County, COCO5,64540.9+8%

36Phillips County, COCO4,42040.9+3%

37Crowley County, COCO5,67740.8+11%

38Bent County, COCO5,71640.6+9%

39Conejos County, COCO7,52940.6+19%

40Jefferson County, COCO580,45140.5+10%

41Yuma County, COCO9,89640.5+9%

42Pueblo County, COCO169,27740.4+10%

43Moffat County, COCO13,12240.1+13%

44Eagle County, COCO54,29139.7+27%

45Douglas County, COCO399,39639.6+18%

46Kit Carson County, COCO7,06939.5+6%

47Summit County, COCO31,51739.5+28%

48Logan County, COCO20,65439.2+7%

49Broomfield County, COCO79,17438.6–

50Rio Blanco County, COCO6,68337.8+1%

51Boulder County, COCO328,56037.7+13%

52Prowers County, COCO11,88437.7+16%

53Garfield County, COCO63,47437.6+10%

54Gunnison County, COCO17,43937.5+23%

55Morgan County, COCO30,30637.5+12%

56San Juan County, COCO81337.5−14%

57Lake County, COCO7,55237.3+22%

58Arapahoe County, COCO673,82037.3+8%

59Larimer County, COCO377,29236.8+11%

60Denver County, COCO740,61335.3+7%

61Weld County, COCO378,42635.3+14%

62El Paso County, COCO757,04035.1+6%

63Adams County, COCO554,66834.8+11%

64Alamosa County, COCO16,68833.2+8%

SHOWING 1–64 OF 64

Download CSV (full list, 64 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES