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 (1990 ACS). This list covers the 63 counties in Colorado that qualify, ranked against each other statewide. The median across all 63 is 22.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

RANKPLACESTATEPOPDIVERSITY SCOREVS –

01Hinsdale County, COCO7533–

02Mineral County, COCO9103–

03Washington County, COCO4,7324–

04Yuma County, COCO9,8967–

05Lincoln County, COCO5,6457–

06Routt County, COCO25,3298–

07Grand County, COCO16,4968–

08Teller County, COCO24,7569–

09San Miguel County, COCO7,7539–

10Custer County, COCO5,5909–

11Phillips County, COCO4,4209–

12Dolores County, COCO2,46610–

13Summit County, COCO31,51710–

14Kiowa County, COCO1,41210–

15Cheyenne County, COCO1,71310–

16Elbert County, COCO30,53411–

17Park County, COCO18,31411–

18Clear Creek County, COCO8,99411–

19Gilpin County, COCO6,07311–

20Gunnison County, COCO17,43912–

21Rio Blanco County, COCO6,68312–

22Douglas County, COCO399,39613–

23Ouray County, COCO5,26513–

24Jackson County, COCO1,21115–

25Baca County, COCO3,34715–

26Garfield County, COCO63,47417–

27Pitkin County, COCO16,62517–

28Moffat County, COCO13,12218–

29Kit Carson County, COCO7,06919–

30Logan County, COCO20,65419–

31Larimer County, COCO377,29221–

32Mesa County, COCO162,84522–

33Jefferson County, COCO580,45122–

34Delta County, COCO32,17822–

35Boulder County, COCO328,56024–

36Sedgwick County, COCO2,24724–

37Montrose County, COCO44,59126–

38Chaffee County, COCO20,83127–

39Fremont County, COCO50,03928–

40San Juan County, COCO81328–

41Eagle County, COCO54,29131–

42Arapahoe County, COCO673,82033–

43La Plata County, COCO56,89835–

44Morgan County, COCO30,30640–

45El Paso County, COCO757,04040–

46Montezuma County, COCO26,67844–

47Weld County, COCO378,42645–

48Costilla County, COCO3,67945–

49Prowers County, COCO11,88446–

50Lake County, COCO7,55247–

51Archuleta County, COCO14,30649–

52Adams County, COCO554,66850–

53Bent County, COCO5,71652–

54Crowley County, COCO5,67759–

55Otero County, COCO17,68360–

56Conejos County, COCO7,52961–

57Rio Grande County, COCO11,08761–

58Huerfano County, COCO7,01162–

59Pueblo County, COCO169,27762–

60Alamosa County, COCO16,68863–

61Las Animas County, COCO14,39163–

62Saguache County, COCO6,73265–

63Denver County, COCO740,61369–

SHOWING 1–63 OF 63

Download CSV (full list, 63 rows)How this score is calculated

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