RANKING · 2024 ACS · 64 SHOWN OF 64

Largest Irish population, Colorado counties

Colorado counties ranked by the number of residents who are Irish ancestry, from the 2024 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.

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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 2010

01El Paso County, COCO757,04083,422+5%

02Denver County, COCO740,61381,438+40%

03Jefferson County, COCO580,45177,379−7%

04Arapahoe County, COCO673,82067,961+7%

05Douglas County, COCO399,39649,813+9%

06Larimer County, COCO377,29246,990+8%

07Adams County, COCO554,66844,168+9%

08Boulder County, COCO328,56041,601+2%

09Weld County, COCO378,42633,843+18%

10Mesa County, COCO162,84519,842−3%

11Pueblo County, COCO169,27714,578−8%

12Broomfield County, COCO79,1749,192+16%

13La Plata County, COCO56,8988,456+9%

14Garfield County, COCO63,4746,271−22%

15Fremont County, COCO50,0395,072−20%

16Eagle County, COCO54,2914,723−27%

17Montrose County, COCO44,5913,935−21%

18Delta County, COCO32,1783,812+13%

19Elbert County, COCO30,5343,673+13%

20Teller County, COCO24,7563,197−22%

21Routt County, COCO25,3293,084−16%

22Montezuma County, COCO26,6782,823−21%

23Chaffee County, COCO20,8312,649−10%

24Park County, COCO18,3142,529−7%

25Summit County, COCO31,5172,400−40%

26Pitkin County, COCO16,6252,329−6%

27Gunnison County, COCO17,4392,320+5%

28Morgan County, COCO30,3062,121−20%

29Archuleta County, COCO14,3061,937+12%

30Moffat County, COCO13,1221,871−7%

31Logan County, COCO20,6541,775−28%

32Clear Creek County, COCO8,9941,642+16%

33Alamosa County, COCO16,6881,581+3%

34Otero County, COCO17,6831,497−17%

35Grand County, COCO16,4961,439−50%

36Las Animas County, COCO14,3911,313−18%

37San Miguel County, COCO7,7531,260+22%

38Yuma County, COCO9,8961,081−13%

39Rio Grande County, COCO11,087996−0%

40Gilpin County, COCO6,073974+23%

41Lake County, COCO7,552778−5%

42Rio Blanco County, COCO6,683771−28%

43Custer County, COCO5,590744+9%

44Saguache County, COCO6,732682−12%

45Kit Carson County, COCO7,069645−15%

46Conejos County, COCO7,529632+10%

47Washington County, COCO4,732559−12%

48Ouray County, COCO5,265547−46%

49Prowers County, COCO11,884541−63%

50Lincoln County, COCO5,645540−16%

51Huerfano County, COCO7,011418−53%

52Bent County, COCO5,716394−33%

53Baca County, COCO3,347371−23%

54Crowley County, COCO5,677348−27%

55Phillips County, COCO4,420300−42%

56Dolores County, COCO2,466285−30%

57Cheyenne County, COCO1,713241−28%

58Sedgwick County, COCO2,247239+22%

59Costilla County, COCO3,679228+15%

60Kiowa County, COCO1,412204+39%

61Hinsdale County, COCO753146+128%

62Mineral County, COCO910133+4%

63Jackson County, COCO1,211131−36%

64San Juan County, COCO81377+1%

SHOWING 1–64 OF 64

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES