RANKING · 2020 CENSUS · 64 SHOWN OF 64

Most sparsely populated, Colorado counties · 2020

Colorado counties with the fewest residents per square mile (2020). This list covers the 64 counties in Colorado that qualify, ranked against each other statewide. The median across all 64 is 12.

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SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Hinsdale County, COCO75310%

02Kiowa County, COCO1,4121−11%

03Jackson County, COCO1,2111−13%

04Cheyenne County, COCO1,7131−22%

05Mineral County, COCO9101+4%

06Baca County, COCO3,3471−22%

07San Juan County, COCO8132+26%

08Washington County, COCO4,7322−2%

09Saguache County, COCO6,7322+8%

10Rio Blanco County, COCO6,6832+9%

11Dolores County, COCO2,4662+26%

12Lincoln County, COCO5,6452−7%

13Moffat County, COCO13,1223+1%

14Costilla County, COCO3,6793−4%

15Las Animas County, COCO14,3913−4%

16Kit Carson County, COCO7,0693−12%

17Bent County, COCO5,7164−6%

18Yuma County, COCO9,8964+1%

19Huerfano County, COCO7,0114−13%

20Sedgwick County, COCO2,2474−12%

21Gunnison County, COCO17,4395+21%

22Conejos County, COCO7,5296−11%

23San Miguel County, COCO7,7536+22%

24Custer County, COCO5,5906+34%

25Phillips County, COCO4,4207+1%

26Prowers County, COCO11,8847−17%

27Crowley County, COCO5,6778+7%

28Park County, COCO18,3148+20%

29Grand County, COCO16,4969+26%

30Ouray County, COCO5,2659+30%

31Archuleta County, COCO14,30610+35%

32Routt County, COCO25,32911+26%

33Logan County, COCO20,65412+5%

34Rio Grande County, COCO11,08713−7%

35Montezuma County, COCO26,67813+8%

36Elbert County, COCO30,53414+31%

37Otero County, COCO17,68315−8%

38Pitkin County, COCO16,62518+17%

39Montrose County, COCO44,59119+28%

40Chaffee County, COCO20,83119+20%

41Lake County, COCO7,55220−5%

42Garfield County, COCO63,47421+41%

43Alamosa County, COCO16,68823+9%

44Morgan County, COCO30,30623+7%

45Clear Creek County, COCO8,99424+1%

46Delta County, COCO32,17827+12%

47Fremont County, COCO50,03932+6%

48La Plata County, COCO56,89833+27%

49Eagle County, COCO54,29133+34%

50Gilpin County, COCO6,07339+22%

51Teller County, COCO24,75644+20%

52Mesa County, COCO162,84547+34%

53Summit County, COCO31,51751+32%

54Pueblo County, COCO169,27770+19%

55Weld County, COCO378,42683+82%

56Larimer County, COCO377,292138+43%

57El Paso County, COCO757,040343+41%

58Douglas County, COCO399,396426+104%

59Adams County, COCO554,668445+43%

60Boulder County, COCO328,560455+14%

61Jefferson County, COCO580,451763+11%

62Arapahoe County, COCO673,820821+34%

63Broomfield County, COCO79,1742,248–

64Denver County, COCO740,6134,674+29%

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