RANKING · 1990 CENSUS · 63 SHOWN OF 63

Oldest housing stock, Colorado counties · 1990

Colorado counties ranked by oldest median year of construction (1990 ACS). This list covers the 63 counties in Colorado that qualify, ranked against each other statewide. The median across all 63 is 1970.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS –

01San Juan County, COCO8131939–

02Sedgwick County, COCO2,2471939–

03Las Animas County, COCO14,3911944–

04Crowley County, COCO5,6771948–

05Huerfano County, COCO7,0111948–

06Bent County, COCO5,7161949–

07Washington County, COCO4,7321949–

08Otero County, COCO17,6831951–

09Lake County, COCO7,5521953–

10Kiowa County, COCO1,4121954–

11Logan County, COCO20,6541954–

12Lincoln County, COCO5,6451955–

13Yuma County, COCO9,8961956–

14Denver County, COCO740,6131957–

15Phillips County, COCO4,4201957–

16Morgan County, COCO30,3061959–

17Pueblo County, COCO169,2771959–

18Baca County, COCO3,3471960–

19Prowers County, COCO11,8841960–

20Rio Grande County, COCO11,0871960–

21Conejos County, COCO7,5291961–

22Kit Carson County, COCO7,0691961–

23Cheyenne County, COCO1,7131962–

24Dolores County, COCO2,4661962–

25Mineral County, COCO9101962–

26Alamosa County, COCO16,6881963–

27Gilpin County, COCO6,0731963–

28Hinsdale County, COCO7531964–

29Jackson County, COCO1,2111964–

30Fremont County, COCO50,0391968–

31Chaffee County, COCO20,8311969–

32Delta County, COCO32,1781970–

33Costilla County, COCO3,6791970–

34Clear Creek County, COCO8,9941970–

35Montrose County, COCO44,5911971–

36Adams County, COCO554,6681971–

37Saguache County, COCO6,7321971–

38Weld County, COCO378,4261971–

39Boulder County, COCO328,5601972–

40Montezuma County, COCO26,6781972–

41Custer County, COCO5,5901973–

42El Paso County, COCO757,0401973–

43Jefferson County, COCO580,4511973–

44La Plata County, COCO56,8981973–

45Mesa County, COCO162,8451973–

46Ouray County, COCO5,2651973–

47Gunnison County, COCO17,4391974–

48Larimer County, COCO377,2921974–

49Moffat County, COCO13,1221974–

50Pitkin County, COCO16,6251974–

51Rio Blanco County, COCO6,6831974–

52Garfield County, COCO63,4741975–

53Routt County, COCO25,3291975–

54Park County, COCO18,3141976–

55Arapahoe County, COCO673,8201976–

56Grand County, COCO16,4961976–

57Eagle County, COCO54,2911977–

58Elbert County, COCO30,5341977–

59San Miguel County, COCO7,7531977–

60Teller County, COCO24,7561977–

61Summit County, COCO31,5171978–

62Archuleta County, COCO14,3061979–

63Douglas County, COCO399,3961983–

SHOWING 1–63 OF 63

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS