RANKING · 2020 CENSUS · 64 SHOWN OF 64

Highest Irish population share, Colorado counties · 2020

Colorado counties ranked by the share of all residents who are Irish ancestry (2020 American Community Survey). A concentration measure: Irish residents as a percentage of total population. This list covers the 64 counties in Colorado that qualify, ranked against each other statewide. The median across all 64 is 10.9%.

Irish Americans: full group profile →

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2010

01Clear Creek County, COCO8,99417.9%+2.3 pts

02Kiowa County, COCO1,41217.6%+8.7 pts

03Mineral County, COCO91016.6%+4.1 pts

04Gilpin County, COCO6,07316.3%+0.9 pts

05Rio Blanco County, COCO6,68316.1%−0.3 pts

06Gunnison County, COCO17,43914.9%+0.3 pts

07Archuleta County, COCO14,30614.6%+0.3 pts

08Hinsdale County, COCO75314.5%+1.4 pts

09Teller County, COCO24,75614.5%−3.5 pts

10Moffat County, COCO13,12214.1%−0.9 pts

11La Plata County, COCO56,89813.6%−1.8 pts

12Cheyenne County, COCO1,71313.1%−2.3 pts

13Larimer County, COCO377,29213.0%−1.9 pts

14Custer County, COCO5,59013.0%−4.6 pts

15Jefferson County, COCO580,45113.0%−2.8 pts

16San Miguel County, COCO7,75312.9%−1.3 pts

17Douglas County, COCO399,39612.8%−3.8 pts

18Pitkin County, COCO16,62512.8%−2.4 pts

19Ouray County, COCO5,26512.8%−10.7 pts

20Washington County, COCO4,73212.8%−0.6 pts

21Mesa County, COCO162,84512.7%−1.7 pts

22Yuma County, COCO9,89612.4%0.0 pts

23Broomfield County, COCO79,17412.3%−2.6 pts

24Delta County, COCO32,17811.9%+0.8 pts

25Boulder County, COCO328,56011.7%−2.3 pts

26Saguache County, COCO6,73211.5%−1.1 pts

27Huerfano County, COCO7,01111.4%−1.4 pts

28Routt County, COCO25,32911.4%−4.7 pts

29Elbert County, COCO30,53411.3%−3.0 pts

30Summit County, COCO31,51711.2%−3.6 pts

31Dolores County, COCO2,46611.0%−9.1 pts

32Otero County, COCO17,68310.9%+1.3 pts

33Garfield County, COCO63,47410.7%−4.0 pts

34Chaffee County, COCO20,83110.5%−6.2 pts

35Grand County, COCO16,49610.5%−9.3 pts

36El Paso County, COCO757,04010.4%−2.8 pts

37Fremont County, COCO50,03910.2%−3.3 pts

38Alamosa County, COCO16,68810.2%+0.1 pts

39Denver County, COCO740,61310.1%0.0 pts

40Weld County, COCO378,42610.1%−1.7 pts

41Arapahoe County, COCO673,82010.0%−1.4 pts

42Logan County, COCO20,6549.9%−1.1 pts

43Lincoln County, COCO5,6459.9%−1.9 pts

44Kit Carson County, COCO7,0699.8%+0.5 pts

45Montrose County, COCO44,5919.7%−2.7 pts

46Eagle County, COCO54,2919.4%−3.3 pts

47Baca County, COCO3,3479.3%−3.3 pts

48Morgan County, COCO30,3069.3%−0.2 pts

49San Juan County, COCO8139.3%−0.8 pts

50Pueblo County, COCO169,2779.3%−0.9 pts

51Montezuma County, COCO26,6789.2%−5.0 pts

52Park County, COCO18,3149.1%−7.5 pts

53Jackson County, COCO1,2119.1%−5.0 pts

54Lake County, COCO7,5528.5%−3.1 pts

55Las Animas County, COCO14,3918.2%−2.0 pts

56Adams County, COCO554,6688.2%−1.3 pts

57Rio Grande County, COCO11,0877.0%−1.4 pts

58Crowley County, COCO5,6777.0%−1.1 pts

59Conejos County, COCO7,5296.9%−0.1 pts

60Bent County, COCO5,7166.7%−3.0 pts

61Sedgwick County, COCO2,2476.5%−1.6 pts

62Prowers County, COCO11,8846.4%−4.9 pts

63Phillips County, COCO4,4206.3%−5.4 pts

64Costilla County, COCO3,6794.0%−1.7 pts

SHOWING 1–64 OF 64

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