RANKING · 1990 CENSUS · 63 SHOWN OF 63

Most sparsely populated, Colorado counties · 1990

Colorado counties with the fewest residents per square mile (1990). This list covers the 63 counties in Colorado that qualify, ranked against each other statewide. The median across all 63 is 6.

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SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS –

01Hinsdale County, COCO7530–

02Mineral County, COCO9101–

03Kiowa County, COCO1,4121–

04Jackson County, COCO1,2111–

05Cheyenne County, COCO1,7131–

06Dolores County, COCO2,4661–

07Saguache County, COCO6,7321–

08Lincoln County, COCO5,6452–

09Baca County, COCO3,3472–

10Rio Blanco County, COCO6,6832–

11Washington County, COCO4,7322–

12San Juan County, COCO8132–

13Moffat County, COCO13,1222–

14Costilla County, COCO3,6793–

15Custer County, COCO5,5903–

16San Miguel County, COCO7,7533–

17Las Animas County, COCO14,3913–

18Gunnison County, COCO17,4393–

19Park County, COCO18,3143–

20Kit Carson County, COCO7,0693–

21Bent County, COCO5,7163–

22Huerfano County, COCO7,0114–

23Yuma County, COCO9,8964–

24Archuleta County, COCO14,3064–

25Ouray County, COCO5,2654–

26Grand County, COCO16,4964–

27Sedgwick County, COCO2,2475–

28Crowley County, COCO5,6775–

29Elbert County, COCO30,5345–

30Conejos County, COCO7,5296–

31Routt County, COCO25,3296–

32Phillips County, COCO4,4206–

33Prowers County, COCO11,8848–

34Montezuma County, COCO26,6789–

35Logan County, COCO20,65410–

36Garfield County, COCO63,47410–

37Montrose County, COCO44,59111–

38Rio Grande County, COCO11,08712–

39Chaffee County, COCO20,83113–

40Eagle County, COCO54,29113–

41Pitkin County, COCO16,62513–

42Lake County, COCO7,55216–

43Otero County, COCO17,68316–

44Morgan County, COCO30,30617–

45Delta County, COCO32,17818–

46Alamosa County, COCO16,68819–

47La Plata County, COCO56,89819–

48Clear Creek County, COCO8,99419–

49Gilpin County, COCO6,07320–

50Fremont County, COCO50,03921–

51Summit County, COCO31,51721–

52Teller County, COCO24,75622–

53Mesa County, COCO162,84528–

54Weld County, COCO378,42633–

55Pueblo County, COCO169,27752–

56Larimer County, COCO377,29272–

57Douglas County, COCO399,39672–

58El Paso County, COCO757,040187–

59Adams County, COCO554,668227–

60Boulder County, COCO328,560310–

61Arapahoe County, COCO673,820491–

62Jefferson County, COCO580,451574–

63Denver County, COCO740,6133,055–

SHOWING 1–63 OF 63

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