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 (2023 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.

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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 SHAREVS 2000

01Clear Creek County, COCO8,99417.9%–

02Kiowa County, COCO1,41217.6%–

03Mineral County, COCO91016.6%–

04Gilpin County, COCO6,07316.3%–

05Rio Blanco County, COCO6,68316.1%–

06Gunnison County, COCO17,43914.9%–

07Archuleta County, COCO14,30614.6%–

08Hinsdale County, COCO75314.5%–

09Teller County, COCO24,75614.5%–

10Moffat County, COCO13,12214.1%–

11La Plata County, COCO56,89813.6%–

12Cheyenne County, COCO1,71313.1%–

13Larimer County, COCO377,29213.0%–

14Custer County, COCO5,59013.0%–

15Jefferson County, COCO580,45113.0%–

16San Miguel County, COCO7,75312.9%–

17Douglas County, COCO399,39612.8%–

18Pitkin County, COCO16,62512.8%–

19Ouray County, COCO5,26512.8%–

20Washington County, COCO4,73212.8%–

21Mesa County, COCO162,84512.7%–

22Yuma County, COCO9,89612.4%–

23Broomfield County, COCO79,17412.3%–

24Delta County, COCO32,17811.9%–

25Boulder County, COCO328,56011.7%–

26Saguache County, COCO6,73211.5%–

27Huerfano County, COCO7,01111.4%–

28Routt County, COCO25,32911.4%–

29Elbert County, COCO30,53411.3%–

30Summit County, COCO31,51711.2%–

31Dolores County, COCO2,46611.0%–

32Otero County, COCO17,68310.9%–

33Garfield County, COCO63,47410.7%–

34Chaffee County, COCO20,83110.5%–

35Grand County, COCO16,49610.5%–

36El Paso County, COCO757,04010.4%–

37Fremont County, COCO50,03910.2%–

38Alamosa County, COCO16,68810.2%–

39Denver County, COCO740,61310.1%–

40Weld County, COCO378,42610.1%–

41Arapahoe County, COCO673,82010.0%–

42Logan County, COCO20,6549.9%–

43Lincoln County, COCO5,6459.9%–

44Kit Carson County, COCO7,0699.8%–

45Montrose County, COCO44,5919.7%–

46Eagle County, COCO54,2919.4%–

47Baca County, COCO3,3479.3%–

48Morgan County, COCO30,3069.3%–

49San Juan County, COCO8139.3%–

50Pueblo County, COCO169,2779.3%–

51Montezuma County, COCO26,6789.2%–

52Park County, COCO18,3149.1%–

53Jackson County, COCO1,2119.1%–

54Lake County, COCO7,5528.5%–

55Las Animas County, COCO14,3918.2%–

56Adams County, COCO554,6688.2%–

57Rio Grande County, COCO11,0877.0%–

58Crowley County, COCO5,6777.0%–

59Conejos County, COCO7,5296.9%–

60Bent County, COCO5,7166.7%–

61Sedgwick County, COCO2,2476.5%–

62Prowers County, COCO11,8846.4%–

63Phillips County, COCO4,4206.3%–

64Costilla County, COCO3,6794.0%–

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