RANKING · 2020 CENSUS · 67 SHOWN OF 67

Highest Scotch-Irish population share, Pennsylvania counties · 2020

Pennsylvania counties ranked by the share of all residents who are Scotch-Irish ancestry (2020 American Community Survey). A concentration measure: Scotch-Irish residents as a percentage of total population. 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

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01Washington County, PAPA210,8023.6%−1.9 pts

02Lawrence County, PAPA83,9113.4%−2.4 pts

03Butler County, PAPA200,1693.0%−1.7 pts

04Greene County, PAPA33,8852.8%−2.0 pts

05Mercer County, PAPA107,8602.8%−1.5 pts

06Armstrong County, PAPA63,6982.7%−0.9 pts

07Perry County, PAPA46,8062.7%+0.2 pts

08Venango County, PAPA49,3462.6%−1.8 pts

09Cameron County, PAPA4,2112.5%+0.2 pts

10Beaver County, PAPA166,0322.4%−1.5 pts

11Huntingdon County, PAPA43,0012.1%−0.7 pts

12Indiana County, PAPA82,8782.1%−2.0 pts

13Clarion County, PAPA36,6802.0%−1.4 pts

14Westmoreland County, PAPA349,3242.0%−1.1 pts

15Mifflin County, PAPA46,1272.0%−0.8 pts

16Franklin County, PAPA160,6521.9%−1.0 pts

17Crawford County, PAPA81,7921.9%−1.9 pts

18Warren County, PAPA37,0381.8%−1.2 pts

19Jefferson County, PAPA43,2551.8%−1.2 pts

20Tioga County, PAPA40,5021.6%−0.4 pts

21McKean County, PAPA38,9841.6%−0.3 pts

22Clearfield County, PAPA78,1001.5%−0.4 pts

23Cumberland County, PAPA277,2701.5%−1.4 pts

24Allegheny County, PAPA1,225,0351.5%−1.0 pts

25Forest County, PAPA6,6141.5%−1.5 pts

26Fayette County, PAPA123,0211.5%−0.5 pts

27Centre County, PAPA157,3931.4%−0.7 pts

28Erie County, PAPA265,8321.4%−1.1 pts

29Juniata County, PAPA23,4031.3%−1.1 pts

30Adams County, PAPA107,5941.3%−0.6 pts

31Blair County, PAPA119,5411.3%−1.2 pts

32Montour County, PAPA17,8681.3%+0.0 pts

33Potter County, PAPA15,8971.2%−0.5 pts

34York County, PAPA473,1971.2%−0.8 pts

35Chester County, PAPA557,1161.1%−1.4 pts

36Fulton County, PAPA14,4831.1%−0.7 pts

37Cambria County, PAPA128,9681.1%−0.7 pts

38Elk County, PAPA29,9261.1%−0.5 pts

39Lancaster County, PAPA563,1591.1%−0.9 pts

40Clinton County, PAPA37,8701.0%−0.9 pts

41Union County, PAPA42,3131.0%−0.3 pts

42Dauphin County, PAPA293,3511.0%−1.1 pts

43Bucks County, PAPA647,8281.0%−0.9 pts

44Lebanon County, PAPA146,3800.9%−0.6 pts

45Bedford County, PAPA47,4800.9%−0.9 pts

46Somerset County, PAPA72,0040.9%−0.7 pts

47Lycoming County, PAPA112,5870.9%−0.6 pts

48Bradford County, PAPA59,6000.9%−0.9 pts

49Susquehanna County, PAPA38,2370.8%−1.0 pts

50Delaware County, PAPA580,9370.8%−1.0 pts

51Pike County, PAPA62,8080.8%−0.3 pts

52Montgomery County, PAPA877,6430.8%−1.0 pts

53Monroe County, PAPA167,1790.7%−0.5 pts

54Wyoming County, PAPA25,7900.7%−0.6 pts

55Sullivan County, PAPA5,8560.7%−1.6 pts

56Carbon County, PAPA65,8680.7%−0.2 pts

57Columbia County, PAPA66,1930.6%−0.3 pts

58Wayne County, PAPA51,7030.6%−0.6 pts

59Northumberland County, PAPA89,9200.6%−0.5 pts

60Northampton County, PAPA324,4110.6%−0.6 pts

61Berks County, PAPA440,0720.5%−0.5 pts

62Snyder County, PAPA39,6550.5%−0.4 pts

63Lehigh County, PAPA384,3830.4%−0.6 pts

64Schuylkill County, PAPA145,0850.4%−0.1 pts

65Lackawanna County, PAPA216,5020.3%−0.6 pts

66Luzerne County, PAPA332,1260.3%−0.5 pts

67Philadelphia County, PAPA1,574,2810.3%−0.4 pts

SHOWING 1–67 OF 67

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS