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. The median across all 64 is 1,642. Biggest climber in the top 100 since 2020: Park County, CO, up 9 places to #24.

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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

01▲1El Paso County, COCO757,04083,422+5%

02▲1Denver County, COCO740,61381,438+40%

03▼2Jefferson County, COCO580,45177,379−7%

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

05▲1Douglas County, COCO399,39649,813+9%

06▼1Larimer 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%

15▲1Fremont County, COCO50,0395,072−20%

16▼1Eagle County, COCO54,2914,723−27%

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

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

19▲2Elbert County, COCO30,5343,673+13%

20▼1Teller County, COCO24,7563,197−22%

21▲1Routt County, COCO25,3293,084−16%

22▲3Montezuma County, COCO26,6782,823−21%

23▲5Chaffee County, COCO20,8312,649−10%

24▲9Park County, COCO18,3142,529−7%

25▼5Summit County, COCO31,5172,400−40%

26Pitkin County, COCO16,6252,329−6%

27▼3Gunnison County, COCO17,4392,320+5%

28▼5Morgan County, COCO30,3062,121−20%

29▲1Archuleta County, COCO14,3061,937+12%

30▲1Moffat County, COCO13,1221,871−7%

31▼4Logan County, COCO20,6541,775−28%

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

33▲1Alamosa County, COCO16,6881,581+3%

34▼5Otero County, COCO17,6831,497−17%

35Grand County, COCO16,4961,439−50%

36▲1Las Animas County, COCO14,3911,313−18%

37▲1San Miguel County, COCO7,7531,260+22%

38▼2Yuma County, COCO9,8961,081−13%

39▲2Rio Grande County, COCO11,0879960%

40Gilpin County, COCO6,073974+23%

41▲5Lake County, COCO7,552778−5%

42▼3Rio Blanco County, COCO6,683771−28%

43▲4Custer County, COCO5,590744+9%

44▼1Saguache County, COCO6,732682−12%

45Kit Carson County, COCO7,069645−15%

46▲4Conejos County, COCO7,529632+10%

47▲2Washington County, COCO4,732559−12%

48Ouray County, COCO5,265547−46%

49▼7Prowers County, COCO11,884541−63%

50▲1Lincoln County, COCO5,645540−16%

51▼7Huerfano County, COCO7,011418−53%

52▲1Bent County, COCO5,716394−33%

53▲1Baca County, COCO3,347371−23%

54▼2Crowley County, COCO5,677348−27%

55Phillips County, COCO4,420300−42%

56▲2Dolores County, COCO2,466285−30%

57▼1Cheyenne County, COCO1,713241−28%

58▲2Sedgwick County, COCO2,247239+22%

59Costilla County, COCO3,679228+15%

60▼3Kiowa County, COCO1,412204+39%

61▲2Hinsdale County, COCO753146+128%

62▼1Mineral County, COCO910133+4%

63▼1Jackson County, COCO1,211131−36%

64San Juan County, COCO81377+1%

SHOWING 1–64 OF 64

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES