RANKING · 2024 ACS · 67 SHOWN OF 67

Largest Irish population, Pennsylvania counties

Pennsylvania 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 67 counties in Pennsylvania that qualify, ranked against each other statewide. The median across all 67 is 12,008. Biggest climber in the top 100 since 2020: Perry County, PA, up 7 places to #48.

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH POPULATIONVS 2010

01Allegheny County, PAPA1,225,035208,956−16%

02Montgomery County, PAPA877,643164,018−8%

03Philadelphia County, PAPA1,574,281151,253−23%

04Bucks County, PAPA647,828142,325−15%

05Delaware County, PAPA580,937128,710−19%

06Chester County, PAPA557,116114,109−4%

07▲1Lancaster County, PAPA563,15959,328+2%

08▼1Westmoreland County, PAPA349,32457,846−12%

09▲1York County, PAPA473,19755,7640%

10▼1Luzerne County, PAPA332,12652,537−18%

11Lackawanna County, PAPA216,50247,387−19%

12Berks County, PAPA440,07243,526−17%

13▲2Lehigh County, PAPA384,38337,984−11%

14▲2Butler County, PAPA200,16937,715−5%

15▼1Northampton County, PAPA324,41137,210−14%

16▼3Erie County, PAPA265,83235,471−29%

17▲1Cumberland County, PAPA277,27034,946−4%

18▼1Washington County, PAPA210,80233,961−13%

19Dauphin County, PAPA293,35131,092−4%

20Beaver County, PAPA166,03229,040−11%

21▲1Monroe County, PAPA167,17924,037−16%

22▼1Schuylkill County, PAPA145,08523,701−18%

23▲3Centre County, PAPA157,39322,346+10%

24▼1Cambria County, PAPA128,96821,064−21%

25Blair County, PAPA119,54120,597−19%

26▼2Fayette County, PAPA123,02119,973−16%

27▲1Franklin County, PAPA160,65216,760−11%

28▼1Mercer County, PAPA107,86015,873−20%

29▲1Lawrence County, PAPA83,91115,159−5%

30▼1Lycoming County, PAPA112,58714,938−13%

31Lebanon County, PAPA146,38013,886−9%

32▲3Adams County, PAPA107,59413,280−8%

33▼1Crawford County, PAPA81,79212,424−23%

34▼1Pike County, PAPA62,80812,008−6%

35▼1Indiana County, PAPA82,87810,665−41%

36Armstrong County, PAPA63,69810,582−21%

37▲2Northumberland County, PAPA89,92010,013−8%

38▼1Carbon County, PAPA65,8689,793−8%

39▲1Clearfield County, PAPA78,1009,571−8%

40▼2Wayne County, PAPA51,7039,553−25%

41▲1Venango County, PAPA49,3468,345−16%

42▼1Bradford County, PAPA59,6008,084−21%

43Susquehanna County, PAPA38,2377,436−20%

44Somerset County, PAPA72,0047,047−26%

45▲2Huntingdon County, PAPA43,0016,239−19%

46▼1Columbia County, PAPA66,1936,238−31%

47▼1McKean County, PAPA38,9845,719−24%

48▲7Perry County, PAPA46,8065,716−15%

49▼1Mifflin County, PAPA46,1275,538−8%

50▲4Bedford County, PAPA47,4805,204−12%

51▲1Jefferson County, PAPA43,2555,162−22%

52▼2Warren County, PAPA37,0385,070−16%

53▼4Clarion County, PAPA36,6804,944−24%

54▼3Greene County, PAPA33,8854,932−34%

55▼2Tioga County, PAPA40,5024,762−16%

56Clinton County, PAPA37,8704,522−22%

57▲1Elk County, PAPA29,9264,116−18%

58▼1Wyoming County, PAPA25,7903,903−30%

59▲1Snyder County, PAPA39,6553,217−12%

60▼1Union County, PAPA42,3132,945−39%

61Juniata County, PAPA23,4032,127−30%

62Potter County, PAPA15,8972,006−24%

63Montour County, PAPA17,8681,899−8%

64Fulton County, PAPA14,4831,384−33%

65Sullivan County, PAPA5,856855−36%

66Forest County, PAPA6,614850−15%

67Cameron County, PAPA4,211622−17%

SHOWING 1–67 OF 67

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