RANKING · 2010 CENSUS · 67 SHOWN OF 67

Largest Irish population, Pennsylvania counties · 2010

Pennsylvania counties ranked by the number of residents who are Irish ancestry, from the 2023 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.

PennsylvaniaAll states All rankings

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 2000

01Allegheny County, PAPA1,225,035248,120–

02Philadelphia County, PAPA1,574,281195,849–

03Montgomery County, PAPA877,643178,537–

04Bucks County, PAPA647,828166,515–

05Delaware County, PAPA580,937159,534–

06Chester County, PAPA557,116119,155–

07Westmoreland County, PAPA349,32466,002–

08Luzerne County, PAPA332,12663,846–

09Lackawanna County, PAPA216,50258,615–

10Lancaster County, PAPA563,15958,264–

11York County, PAPA473,19755,844–

12Berks County, PAPA440,07252,307–

13Erie County, PAPA265,83250,289–

14Northampton County, PAPA324,41143,124–

15Lehigh County, PAPA384,38342,698–

16Butler County, PAPA200,16939,565–

17Washington County, PAPA210,80239,239–

18Cumberland County, PAPA277,27036,543–

19Beaver County, PAPA166,03232,702–

20Dauphin County, PAPA293,35132,428–

21Schuylkill County, PAPA145,08528,998–

22Monroe County, PAPA167,17928,641–

23Cambria County, PAPA128,96826,736–

24Blair County, PAPA119,54125,556–

25Fayette County, PAPA123,02123,818–

26Centre County, PAPA157,39320,295–

27Mercer County, PAPA107,86019,763–

28Franklin County, PAPA160,65218,736–

29Indiana County, PAPA82,87817,956–

30Lycoming County, PAPA112,58717,178–

31Crawford County, PAPA81,79216,052–

32Lawrence County, PAPA83,91115,887–

33Lebanon County, PAPA146,38015,221–

34Adams County, PAPA107,59414,505–

35Armstrong County, PAPA63,69813,475–

36Pike County, PAPA62,80812,772–

37Wayne County, PAPA51,70312,685–

38Northumberland County, PAPA89,92010,837–

39Carbon County, PAPA65,86810,600–

40Clearfield County, PAPA78,10010,388–

41Bradford County, PAPA59,60010,296–

42Venango County, PAPA49,3469,899–

43Somerset County, PAPA72,0049,494–

44Susquehanna County, PAPA38,2379,267–

45Columbia County, PAPA66,1938,986–

46Huntingdon County, PAPA43,0017,686–

47McKean County, PAPA38,9847,566–

48Greene County, PAPA33,8857,445–

49Perry County, PAPA46,8066,747–

50Jefferson County, PAPA43,2556,630–

51Clarion County, PAPA36,6806,529–

52Mifflin County, PAPA46,1276,023–

53Warren County, PAPA37,0386,004–

54Bedford County, PAPA47,4805,919–

55Clinton County, PAPA37,8705,794–

56Tioga County, PAPA40,5025,701–

57Wyoming County, PAPA25,7905,605–

58Elk County, PAPA29,9265,027–

59Union County, PAPA42,3134,834–

60Snyder County, PAPA39,6553,652–

61Juniata County, PAPA23,4033,059–

62Potter County, PAPA15,8972,624–

63Fulton County, PAPA14,4832,067–

64Montour County, PAPA17,8682,062–

65Sullivan County, PAPA5,8561,332–

66Forest County, PAPA6,614997–

67Cameron County, PAPA4,211748–

SHOWING 1–67 OF 67

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