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.

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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

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%

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

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

09York County, PAPA473,19755,764−0%

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

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

12Berks County, PAPA440,07243,526−17%

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

14Butler County, PAPA200,16937,715−5%

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

16Erie County, PAPA265,83235,471−29%

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

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

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

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

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

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

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

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

25Blair County, PAPA119,54120,597−19%

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

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

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

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

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

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

32Adams County, PAPA107,59413,280−8%

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

34Pike County, PAPA62,80812,008−6%

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

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

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

38Carbon County, PAPA65,8689,793−8%

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

40Wayne County, PAPA51,7039,553−25%

41Venango County, PAPA49,3468,345−16%

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

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

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

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

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

47McKean County, PAPA38,9845,719−24%

48Perry County, PAPA46,8065,716−15%

49Mifflin County, PAPA46,1275,538−8%

50Bedford County, PAPA47,4805,204−12%

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

52Warren County, PAPA37,0385,070−16%

53Clarion County, PAPA36,6804,944−24%

54Greene County, PAPA33,8854,932−34%

55Tioga County, PAPA40,5024,762−16%

56Clinton County, PAPA37,8704,522−22%

57Elk County, PAPA29,9264,116−18%

58Wyoming County, PAPA25,7903,903−30%

59Snyder County, PAPA39,6553,217−12%

60Union 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

Download CSV (full list, 67 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES