RANKING · 2010 CENSUS · 64 SHOWN OF 64

Largest Irish population, Colorado counties · 2010

Colorado counties ranked by the number of residents who are Irish ancestry, from the 2010 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 64 counties in Colorado that qualify, ranked against each other statewide. The median across all 64 is 1,798.

Irish Americans: full group profile →

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SAME RANKING BYCities States Metros

RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH POPULATIONVS –

01Jefferson County, COCO580,45183,036–

02El Paso County, COCO757,04079,477–

03Arapahoe County, COCO673,82063,281–

04Denver County, COCO740,61358,273–

05Douglas County, COCO399,39645,609–

06Larimer County, COCO377,29243,543–

07Boulder County, COCO328,56040,812–

08Adams County, COCO554,66840,661–

09Weld County, COCO378,42628,780–

10Mesa County, COCO162,84520,401–

11Pueblo County, COCO169,27715,890–

12Garfield County, COCO63,4748,052–

13Broomfield County, COCO79,1747,896–

14La Plata County, COCO56,8987,726–

15Eagle County, COCO54,2916,474–

16Fremont County, COCO50,0396,342–

17Montrose County, COCO44,5914,993–

18Teller County, COCO24,7564,098–

19Summit County, COCO31,5174,025–

20Routt County, COCO25,3293,691–

21Montezuma County, COCO26,6783,580–

22Delta County, COCO32,1783,383–

23Elbert County, COCO30,5343,260–

24Chaffee County, COCO20,8312,936–

25Grand County, COCO16,4962,872–

26Park County, COCO18,3142,715–

27Morgan County, COCO30,3062,659–

28Pitkin County, COCO16,6252,488–

29Logan County, COCO20,6542,467–

30Gunnison County, COCO17,4392,207–

31Moffat County, COCO13,1222,021–

32Otero County, COCO17,6831,798–

33Archuleta County, COCO14,3061,732–

34Las Animas County, COCO14,3911,596–

35Alamosa County, COCO16,6881,541–

36Prowers County, COCO11,8841,450–

37Clear Creek County, COCO8,9941,414–

38Yuma County, COCO9,8961,236–

39Rio Blanco County, COCO6,6831,065–

40San Miguel County, COCO7,7531,036–

41Ouray County, COCO5,2651,012–

42Rio Grande County, COCO11,087998–

43Huerfano County, COCO7,011893–

44Lake County, COCO7,552815–

45Gilpin County, COCO6,073791–

46Saguache County, COCO6,732775–

47Kit Carson County, COCO7,069756–

48Custer County, COCO5,590685–

49Lincoln County, COCO5,645646–

50Washington County, COCO4,732638–

51Bent County, COCO5,716591–

52Conejos County, COCO7,529575–

53Phillips County, COCO4,420514–

54Baca County, COCO3,347482–

55Crowley County, COCO5,677479–

56Dolores County, COCO2,466406–

57Cheyenne County, COCO1,713337–

58Jackson County, COCO1,211206–

59Costilla County, COCO3,679199–

60Sedgwick County, COCO2,247196–

61Kiowa County, COCO1,412147–

62Mineral County, COCO910128–

63San Juan County, COCO81376–

64Hinsdale County, COCO75364–

SHOWING 1–64 OF 64

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