RANKING · 2024 ACS · 67 SHOWN OF 67

Largest Scotch-Irish population, Pennsylvania counties

Pennsylvania counties ranked by the number of residents who are Scotch-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 773. Biggest climber in the top 100 since 2020: Luzerne County, PA, up 12 places to #26.

Scotch-Irish Americans: full group profile →

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SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH POPULATIONVS 2010

01Allegheny County, PAPA1,225,03516,679−45%

02▲2Montgomery County, PAPA877,6436,013−57%

03▲3Chester County, PAPA557,1165,661−55%

04▲1Bucks County, PAPA647,8285,174−56%

05▼3Washington County, PAPA210,8025,163−54%

06▲3York County, PAPA473,1974,861−45%

07▼4Westmoreland County, PAPA349,3244,789−58%

08Butler County, PAPA200,1694,670−46%

09▼2Lancaster County, PAPA563,1594,524−54%

10▲1Philadelphia County, PAPA1,574,2814,219−57%

11▼1Delaware County, PAPA580,9373,306−67%

12▲1Cumberland County, PAPA277,2702,980−55%

13▼1Beaver County, PAPA166,0322,894−57%

14Erie County, PAPA265,8322,473−64%

15▲1Franklin County, PAPA160,6522,412−43%

16▲1Lawrence County, PAPA83,9112,341−55%

17▲1Dauphin County, PAPA293,3512,265−58%

18▲1Berks County, PAPA440,0722,060−54%

19▼4Mercer County, PAPA107,8601,979−61%

20Centre County, PAPA157,3931,677−46%

21▲1Indiana County, PAPA82,8781,607−56%

22▲2Northampton County, PAPA324,4111,567−54%

23▲3Crawford County, PAPA81,7921,385−58%

24▲3Lehigh County, PAPA384,3831,267−64%

25▼2Armstrong County, PAPA63,6981,164−53%

26▲12Luzerne County, PAPA332,1261,155−53%

27▼6Fayette County, PAPA123,0211,142−58%

28Cambria County, PAPA128,9681,063−58%

29Adams County, PAPA107,5941,057−45%

30▼5Blair County, PAPA119,5411,026−68%

31Venango County, PAPA49,346973−60%

32▲4Lycoming County, PAPA112,587967−43%

33▲4Huntingdon County, PAPA43,001841−35%

34▼1Perry County, PAPA46,806773−31%

35▼1Clearfield County, PAPA78,100708−55%

36▲5Jefferson County, PAPA43,255698−48%

37▼7Lebanon County, PAPA146,380646−67%

38▲4Warren County, PAPA37,038623−51%

39▼4Greene County, PAPA33,885601−68%

40▼8Monroe County, PAPA167,179537−74%

41▲5Somerset County, PAPA72,004535−57%

42▲5Bradford County, PAPA59,600512−53%

43▼4Mifflin County, PAPA46,127505−61%

44▼4Clarion County, PAPA36,680491−64%

45▼2Lackawanna County, PAPA216,502439−77%

46▼2Tioga County, PAPA40,502421−50%

47▲1Northumberland County, PAPA89,920415−58%

48▲1Schuylkill County, PAPA145,085392−43%

49▲1Union County, PAPA42,313320−46%

50▲4Carbon County, PAPA65,868308−46%

51▲1Pike County, PAPA62,808304−49%

52▼7McKean County, PAPA38,984301−64%

53▼2Bedford County, PAPA47,480271−70%

54▲5Wayne County, PAPA51,703263−58%

55▼2Columbia County, PAPA66,193235−64%

56Juniata County, PAPA23,403230−61%

57▲3Montour County, PAPA17,8682290%

58▼1Susquehanna County, PAPA38,237203−74%

59▼1Elk County, PAPA29,926189−63%

60▲3Snyder County, PAPA39,655185−46%

61Potter County, PAPA15,897131−56%

62▼7Clinton County, PAPA37,870124−84%

63▲1Fulton County, PAPA14,483122−54%

64▼2Wyoming County, PAPA25,790115−69%

65▲1Forest County, PAPA6,61477−66%

66▲1Sullivan County, PAPA5,85623−84%

67▼2Cameron County, PAPA4,21111−91%

SHOWING 1–67 OF 67

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