RANKING · 2010 CENSUS · 64 SHOWN OF 64

Highest Irish population share, Colorado counties · 2010

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

01Ouray County, COCO5,26523.4%–

02Dolores County, COCO2,46620.0%–

03Grand County, COCO16,49619.8%–

04Teller County, COCO24,75618.0%–

05Custer County, COCO5,59017.6%–

06Chaffee County, COCO20,83116.7%–

07Douglas County, COCO399,39616.7%–

08Park County, COCO18,31416.7%–

09Rio Blanco County, COCO6,68316.4%–

10Routt County, COCO25,32916.1%–

11Jefferson County, COCO580,45115.7%–

12Clear Creek County, COCO8,99415.6%–

13Gilpin County, COCO6,07315.4%–

14La Plata County, COCO56,89815.4%–

15Cheyenne County, COCO1,71315.4%–

16Pitkin County, COCO16,62515.2%–

17Larimer County, COCO377,29215.0%–

18Moffat County, COCO13,12214.9%–

19Broomfield County, COCO79,17414.9%–

20Summit County, COCO31,51714.8%–

21Garfield County, COCO63,47414.7%–

22Gunnison County, COCO17,43914.6%–

23Elbert County, COCO30,53414.4%–

24Mesa County, COCO162,84514.3%–

25Archuleta County, COCO14,30614.3%–

26San Miguel County, COCO7,75314.2%–

27Montezuma County, COCO26,67814.2%–

28Jackson County, COCO1,21114.1%–

29Boulder County, COCO328,56014.1%–

30Fremont County, COCO50,03913.5%–

31Washington County, COCO4,73213.4%–

32El Paso County, COCO757,04013.2%–

33Hinsdale County, COCO75313.1%–

34Huerfano County, COCO7,01112.9%–

35Eagle County, COCO54,29112.7%–

36Saguache County, COCO6,73212.6%–

37Baca County, COCO3,34712.6%–

38Mineral County, COCO91012.5%–

39Yuma County, COCO9,89612.5%–

40Montrose County, COCO44,59112.4%–

41Weld County, COCO378,42611.9%–

42Lincoln County, COCO5,64511.8%–

43Phillips County, COCO4,42011.7%–

44Lake County, COCO7,55211.6%–

45Arapahoe County, COCO673,82011.4%–

46Prowers County, COCO11,88411.4%–

47Delta County, COCO32,17811.1%–

48Logan County, COCO20,65411.1%–

49Las Animas County, COCO14,39110.2%–

50Pueblo County, COCO169,27710.2%–

51San Juan County, COCO81310.1%–

52Denver County, COCO740,61310.1%–

53Alamosa County, COCO16,68810.1%–

54Bent County, COCO5,7169.6%–

55Adams County, COCO554,6689.6%–

56Otero County, COCO17,6839.5%–

57Morgan County, COCO30,3069.5%–

58Kit Carson County, COCO7,0699.3%–

59Kiowa County, COCO1,4128.9%–

60Rio Grande County, COCO11,0878.4%–

61Sedgwick County, COCO2,2478.1%–

62Crowley County, COCO5,6778.1%–

63Conejos County, COCO7,5297.0%–

64Costilla County, COCO3,6795.6%–

SHOWING 1–64 OF 64

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