RANKING · 2024 ACS · 67 SHOWN OF 67

Highest Irish population share, Pennsylvania counties

Pennsylvania counties ranked by the share of all residents who are Irish ancestry (2024 American Community Survey). A concentration measure: Irish residents as a percentage of total population. This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide. The median across all 67 is 13.5%. Biggest climber in the top 100 since 2020: Cameron County, PA, up 32 places to #32.

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2010

01▲1Delaware County, PAPA580,93722.2%−6.4 pts

02▲1Bucks County, PAPA647,82822.0%−4.8 pts

03▼2Lackawanna County, PAPA216,50221.9%−5.5 pts

04▲1Chester County, PAPA557,11620.8%−3.5 pts

05▼1Pike County, PAPA62,80819.8%−2.6 pts

06▲1Susquehanna County, PAPA38,23719.5%−1.9 pts

07▲2Butler County, PAPA200,16919.1%−2.6 pts

08▼2Montgomery County, PAPA877,64318.9%−3.7 pts

09▲1Wayne County, PAPA51,70318.6%−5.6 pts

10▲3Lawrence County, PAPA83,91117.8%+0.5 pts

11▲11Beaver County, PAPA166,03217.5%−1.6 pts

12▲7Blair County, PAPA119,54117.0%−3.1 pts

13▲3Allegheny County, PAPA1,225,03516.9%−3.4 pts

14▲11Venango County, PAPA49,34616.8%−1.1 pts

15▼4Schuylkill County, PAPA145,08516.5%−3.0 pts

16▼1Westmoreland County, PAPA349,32416.4%−1.6 pts

17▼3Armstrong County, PAPA63,69816.4%−3.0 pts

18▲2Washington County, PAPA210,80216.2%−2.8 pts

19▼7Luzerne County, PAPA332,12616.0%−4.0 pts

20▼3Cambria County, PAPA128,96816.0%−2.5 pts

21Fayette County, PAPA123,02115.9%−1.3 pts

22▼4Wyoming County, PAPA25,79015.0%−4.8 pts

23▲3Crawford County, PAPA81,79215.0%−3.0 pts

24▲4Carbon County, PAPA65,86815.0%−1.4 pts

25▼1Mercer County, PAPA107,86014.5%−2.3 pts

26▼18Sullivan County, PAPA5,85614.5%−6.1 pts

27▲7Monroe County, PAPA167,17914.3%−2.7 pts

28▼5McKean County, PAPA38,98414.3%−2.9 pts

29▲7Huntingdon County, PAPA43,00114.3%−2.5 pts

30▲2Greene County, PAPA33,88514.2%−4.9 pts

31▲11Centre County, PAPA157,39314.1%+0.7 pts

32▲32Cameron County, PAPA4,21114.1%−0.3 pts

33▼3Bradford County, PAPA59,60013.5%−3.0 pts

34▲6Elk County, PAPA29,92613.5%−2.0 pts

35▼2Warren County, PAPA37,03813.4%−1.0 pts

36▼7Clarion County, PAPA36,68013.3%−2.9 pts

37▼10Erie County, PAPA265,83213.2%−4.8 pts

38▼3Lycoming County, PAPA112,58713.2%−1.6 pts

39▼2Cumberland County, PAPA277,27013.0%−2.8 pts

40▼9Indiana County, PAPA82,87812.8%−7.4 pts

41▲15Forest County, PAPA6,61412.7%−0.5 pts

42▲5Adams County, PAPA107,59412.5%−1.9 pts

43Potter County, PAPA15,89712.4%−2.5 pts

44▲8Perry County, PAPA46,80612.4%−2.4 pts

45▲3Clearfield County, PAPA78,10012.2%−0.5 pts

46▼2York County, PAPA473,19712.0%−1.0 pts

47▼8Mifflin County, PAPA46,12712.0%−0.9 pts

48▼3Clinton County, PAPA37,87012.0%−2.9 pts

49▼3Jefferson County, PAPA43,25511.8%−2.9 pts

50▼12Northampton County, PAPA324,41111.7%−3.0 pts

51▼10Tioga County, PAPA40,50211.6%−2.1 pts

52▲3Northumberland County, PAPA89,92011.1%−0.5 pts

53▲5Bedford County, PAPA47,48011.0%−0.9 pts

54▲8Dauphin County, PAPA293,35110.7%−1.5 pts

55▼4Franklin County, PAPA160,65210.6%−2.1 pts

56▲3Lancaster County, PAPA563,15910.6%−0.8 pts

57▲4Montour County, PAPA17,86810.5%−0.9 pts

58▼1Berks County, PAPA440,07210.1%−2.8 pts

59▼6Lehigh County, PAPA384,38310.0%−2.4 pts

60▼11Somerset County, PAPA72,0049.7%−2.5 pts

61▲2Lebanon County, PAPA146,3809.6%−2.0 pts

62▼2Philadelphia County, PAPA1,574,2819.6%−3.4 pts

63▼13Columbia County, PAPA66,1939.5%−3.9 pts

64▼10Fulton County, PAPA14,4839.5%−4.4 pts

65Juniata County, PAPA23,4039.1%−3.4 pts

66Snyder County, PAPA39,6558.1%−1.2 pts

67Union County, PAPA42,3136.9%−3.8 pts

SHOWING 1–67 OF 67

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