RANKING · 1990 CENSUS · 63 SHOWN OF 63

Least racially diverse, Colorado counties · 1990

Colorado counties with the lowest CensusEasy Diversity Score, where most residents share the same race or ethnicity (2023 ACS). This list covers the 63 counties in Colorado that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPDIVERSITY SCOREVS 2000

01Hinsdale County, COCO7533−40%

02Mineral County, COCO9104−15%

03Washington County, COCO4,7327−57%

04Lincoln County, COCO5,6459−72%

05Yuma County, COCO9,8969−69%

06Phillips County, COCO4,4209−67%

07Routt County, COCO25,3299+3%

08San Miguel County, COCO7,75310−45%

09Custer County, COCO5,59010+31%

10Dolores County, COCO2,46611+3%

11Park County, COCO18,31412−8%

12Gilpin County, COCO6,07312−13%

13Summit County, COCO31,51712−55%

14Grand County, COCO16,49612−12%

15Teller County, COCO24,75612+4%

16Clear Creek County, COCO8,99413+16%

17Gunnison County, COCO17,43913−8%

18Kiowa County, COCO1,41214+56%

19Elbert County, COCO30,53414+21%

20Cheyenne County, COCO1,71315−27%

21Douglas County, COCO399,39615−28%

22Rio Blanco County, COCO6,68315+17%

23Ouray County, COCO5,26517+56%

24Pitkin County, COCO16,62518−4%

25Garfield County, COCO63,47419−47%

26Jackson County, COCO1,21121+33%

27Moffat County, COCO13,12221−7%

28Baca County, COCO3,34722+27%

29Sedgwick County, COCO2,24725−11%

30Larimer County, COCO377,29225+5%

31Logan County, COCO20,65426−19%

32Jefferson County, COCO580,45126−13%

33San Juan County, COCO81326+48%

34Kit Carson County, COCO7,06926−23%

35Delta County, COCO32,17827−3%

36Mesa County, COCO162,84527+8%

37Fremont County, COCO50,03928−22%

38Boulder County, COCO328,56028−12%

39Chaffee County, COCO20,83130+22%

40Montrose County, COCO44,59130−10%

41Arapahoe County, COCO673,82035−30%

42La Plata County, COCO56,89841+56%

43Eagle County, COCO54,29141−12%

44El Paso County, COCO757,04044+0%

45Montezuma County, COCO26,67846+82%

46Morgan County, COCO30,30651−6%

47Lake County, COCO7,55252−12%

48Weld County, COCO378,42653+1%

49Adams County, COCO554,66854−12%

50Bent County, COCO5,71654−10%

51Archuleta County, COCO14,30656+52%

52Crowley County, COCO5,67757−2%

53Prowers County, COCO11,88459+4%

54Huerfano County, COCO7,01159−6%

55Rio Grande County, COCO11,08762+1%

56Las Animas County, COCO14,39166+7%

57Pueblo County, COCO169,27766+6%

58Otero County, COCO17,68368+11%

59Alamosa County, COCO16,68869+9%

60Conejos County, COCO7,52971+18%

61Costilla County, COCO3,67972+34%

62Saguache County, COCO6,73273+16%

63Denver County, COCO740,61375+1%

SHOWING 1–63 OF 63

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES