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.

Scotch-Irish Americans: full group profile →

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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

RANKPLACESTATEPOPSCOTCH-IRISH POPULATIONVS 2010

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

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

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

04Bucks County, PAPA647,8285,174−56%

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

06York County, PAPA473,1974,861−45%

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

08Butler County, PAPA200,1694,670−46%

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

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

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

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

13Beaver County, PAPA166,0322,894−57%

14Erie County, PAPA265,8322,473−64%

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

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

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

18Berks County, PAPA440,0722,060−54%

19Mercer County, PAPA107,8601,979−61%

20Centre County, PAPA157,3931,677−46%

21Indiana County, PAPA82,8781,607−56%

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

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

24Lehigh County, PAPA384,3831,267−64%

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

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

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

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

29Adams County, PAPA107,5941,057−45%

30Blair County, PAPA119,5411,026−68%

31Venango County, PAPA49,346973−60%

32Lycoming County, PAPA112,587967−43%

33Huntingdon County, PAPA43,001841−35%

34Perry County, PAPA46,806773−31%

35Clearfield County, PAPA78,100708−55%

36Jefferson County, PAPA43,255698−48%

37Lebanon County, PAPA146,380646−67%

38Warren County, PAPA37,038623−51%

39Greene County, PAPA33,885601−68%

40Monroe County, PAPA167,179537−74%

41Somerset County, PAPA72,004535−57%

42Bradford County, PAPA59,600512−53%

43Mifflin County, PAPA46,127505−61%

44Clarion County, PAPA36,680491−64%

45Lackawanna County, PAPA216,502439−77%

46Tioga County, PAPA40,502421−50%

47Northumberland County, PAPA89,920415−58%

48Schuylkill County, PAPA145,085392−43%

49Union County, PAPA42,313320−46%

50Carbon County, PAPA65,868308−46%

51Pike County, PAPA62,808304−49%

52McKean County, PAPA38,984301−64%

53Bedford County, PAPA47,480271−70%

54Wayne County, PAPA51,703263−58%

55Columbia County, PAPA66,193235−64%

56Juniata County, PAPA23,403230−61%

57Montour County, PAPA17,868229+0%

58Susquehanna County, PAPA38,237203−74%

59Elk County, PAPA29,926189−63%

60Snyder County, PAPA39,655185−46%

61Potter County, PAPA15,897131−56%

62Clinton County, PAPA37,870124−84%

63Fulton County, PAPA14,483122−54%

64Wyoming County, PAPA25,790115−69%

65Forest County, PAPA6,61477−66%

66Sullivan County, PAPA5,85623−84%

67Cameron County, PAPA4,21111−91%

SHOWING 1–67 OF 67

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