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 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

RANKPLACESTATEPOPSCOTCH-IRISH POPULATIONVS 2000

01Allegheny County, PAPA1,225,03516,679–

02Montgomery County, PAPA877,6436,013–

03Chester County, PAPA557,1165,661–

04Bucks County, PAPA647,8285,174–

05Washington County, PAPA210,8025,163–

06York County, PAPA473,1974,861–

07Westmoreland County, PAPA349,3244,789–

08Butler County, PAPA200,1694,670–

09Lancaster County, PAPA563,1594,524–

10Philadelphia County, PAPA1,574,2814,219–

11Delaware County, PAPA580,9373,306–

12Cumberland County, PAPA277,2702,980–

13Beaver County, PAPA166,0322,894–

14Erie County, PAPA265,8322,473–

15Franklin County, PAPA160,6522,412–

16Lawrence County, PAPA83,9112,341–

17Dauphin County, PAPA293,3512,265–

18Berks County, PAPA440,0722,060–

19Mercer County, PAPA107,8601,979–

20Centre County, PAPA157,3931,677–

21Indiana County, PAPA82,8781,607–

22Northampton County, PAPA324,4111,567–

23Crawford County, PAPA81,7921,385–

24Lehigh County, PAPA384,3831,267–

25Armstrong County, PAPA63,6981,164–

26Luzerne County, PAPA332,1261,155–

27Fayette County, PAPA123,0211,142–

28Cambria County, PAPA128,9681,063–

29Adams County, PAPA107,5941,057–

30Blair County, PAPA119,5411,026–

31Venango County, PAPA49,346973–

32Lycoming County, PAPA112,587967–

33Huntingdon County, PAPA43,001841–

34Perry County, PAPA46,806773–

35Clearfield County, PAPA78,100708–

36Jefferson County, PAPA43,255698–

37Lebanon County, PAPA146,380646–

38Warren County, PAPA37,038623–

39Greene County, PAPA33,885601–

40Monroe County, PAPA167,179537–

41Somerset County, PAPA72,004535–

42Bradford County, PAPA59,600512–

43Mifflin County, PAPA46,127505–

44Clarion County, PAPA36,680491–

45Lackawanna County, PAPA216,502439–

46Tioga County, PAPA40,502421–

47Northumberland County, PAPA89,920415–

48Schuylkill County, PAPA145,085392–

49Union County, PAPA42,313320–

50Carbon County, PAPA65,868308–

51Pike County, PAPA62,808304–

52McKean County, PAPA38,984301–

53Bedford County, PAPA47,480271–

54Wayne County, PAPA51,703263–

55Columbia County, PAPA66,193235–

56Juniata County, PAPA23,403230–

57Montour County, PAPA17,868229–

58Susquehanna County, PAPA38,237203–

59Elk County, PAPA29,926189–

60Snyder County, PAPA39,655185–

61Potter County, PAPA15,897131–

62Clinton County, PAPA37,870124–

63Fulton County, PAPA14,483122–

64Wyoming County, PAPA25,790115–

65Forest County, PAPA6,61477–

66Sullivan County, PAPA5,85623–

67Cameron County, PAPA4,21111–

SHOWING 1–67 OF 67

Download CSV (full list, 67 rows)

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