RANKING · 2020 CENSUS · 64 SHOWN OF 64

Largest senior population, Colorado counties · 2020

Colorado counties home to the most residents aged 65 and over as of 2020. Ranked by number of people, not the senior share. This list covers the 64 counties in Colorado that qualify, ranked against each other statewide.

ColoradoAll states All rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS 2000

01Jefferson County, COCO580,451101,708+100%

02El Paso County, COCO757,040100,219+124%

03Arapahoe County, COCO673,82090,459+116%

04Denver County, COCO740,61385,758+37%

05Larimer County, COCO377,29261,181+155%

06Adams County, COCO554,66857,823+104%

07Boulder County, COCO328,56051,263+126%

08Douglas County, COCO399,39646,579+536%

09Weld County, COCO378,42641,307+154%

10Pueblo County, COCO169,27733,137+54%

11Mesa County, COCO162,84532,022+82%

12Fremont County, COCO50,03911,415+70%

13La Plata County, COCO56,89811,003+167%

14Broomfield County, COCO79,17410,864–

15Montrose County, COCO44,59110,466+105%

16Delta County, COCO32,1788,567+57%

17Garfield County, COCO63,4748,490+121%

18Eagle County, COCO54,2916,463+417%

19Montezuma County, COCO26,6786,131+86%

20Teller County, COCO24,7566,000+290%

21Chaffee County, COCO20,8315,205+88%

22Morgan County, COCO30,3064,863+37%

23Elbert County, COCO30,5344,640+289%

24Routt County, COCO25,3294,123+316%

25Summit County, COCO31,5174,032+424%

26Otero County, COCO17,6834,013+20%

27Logan County, COCO20,6543,940+33%

28Archuleta County, COCO14,3063,787+221%

29Las Animas County, COCO14,3913,739+37%

30Park County, COCO18,3143,710+250%

31Pitkin County, COCO16,6253,218+218%

32Grand County, COCO16,4962,869+196%

33Alamosa County, COCO16,6882,645+84%

34Rio Grande County, COCO11,0872,628+44%

35Gunnison County, COCO17,4392,497+159%

36Prowers County, COCO11,8842,178+19%

37Huerfano County, COCO7,0112,174+62%

38Moffat County, COCO13,1222,163+75%

39Clear Creek County, COCO8,9941,995+203%

40Yuma County, COCO9,8961,823+13%

41Conejos County, COCO7,5291,613+28%

42Custer County, COCO5,5901,592+208%

43Saguache County, COCO6,7321,539+140%

44Ouray County, COCO5,2651,405+207%

45Kit Carson County, COCO7,0691,369+17%

46Rio Blanco County, COCO6,6831,161+74%

47San Miguel County, COCO7,7531,144+415%

48Gilpin County, COCO6,0731,064+294%

49Washington County, COCO4,7321,046+16%

50Bent County, COCO5,7161,030+8%

51Costilla County, COCO3,679977+59%

52Lincoln County, COCO5,645974+12%

53Phillips County, COCO4,420967+12%

54Lake County, COCO7,552932+82%

55Crowley County, COCO5,677891+49%

56Baca County, COCO3,347890−12%

57Sedgwick County, COCO2,247664+9%

58Dolores County, COCO2,466567+79%

59Cheyenne County, COCO1,713391+6%

60Jackson County, COCO1,211339+65%

61Kiowa County, COCO1,412330+16%

62Mineral County, COCO910296+106%

63Hinsdale County, COCO753252+174%

64San Juan County, COCO813165+323%

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