RANKING · 2010 CENSUS · 67 SHOWN OF 67

Highest Scotch-Irish population share, Pennsylvania counties · 2010

Pennsylvania counties ranked by the share of all residents who are Scotch-Irish ancestry (2010 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. The median across all 67 is 1.9%.

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 SHAREVS –

01Lawrence County, PAPA83,9115.7%–

02Washington County, PAPA210,8025.5%–

03Greene County, PAPA33,8854.9%–

04Butler County, PAPA200,1694.7%–

05Venango County, PAPA49,3464.4%–

06Mercer County, PAPA107,8604.3%–

07Indiana County, PAPA82,8784.1%–

08Beaver County, PAPA166,0323.9%–

09Crawford County, PAPA81,7923.7%–

10Armstrong County, PAPA63,6983.6%–

11Clarion County, PAPA36,6803.4%–

12Westmoreland County, PAPA349,3243.1%–

13Warren County, PAPA37,0383.0%–

14Jefferson County, PAPA43,2553.0%–

15Forest County, PAPA6,6143.0%–

16Franklin County, PAPA160,6522.9%–

17Cumberland County, PAPA277,2702.9%–

18Huntingdon County, PAPA43,0012.8%–

19Mifflin County, PAPA46,1272.8%–

20Chester County, PAPA557,1162.6%–

21Blair County, PAPA119,5412.5%–

22Erie County, PAPA265,8322.5%–

23Allegheny County, PAPA1,225,0352.5%–

24Perry County, PAPA46,8062.5%–

25Juniata County, PAPA23,4032.4%–

26Cameron County, PAPA4,2112.3%–

27Sullivan County, PAPA5,8562.3%–

28York County, PAPA473,1972.1%–

29Centre County, PAPA157,3932.1%–

30Tioga County, PAPA40,5022.0%–

31Dauphin County, PAPA293,3512.0%–

32Fayette County, PAPA123,0212.0%–

33Lancaster County, PAPA563,1591.9%–

34Clinton County, PAPA37,8701.9%–

35Clearfield County, PAPA78,1001.9%–

36McKean County, PAPA38,9841.9%–

37Adams County, PAPA107,5941.9%–

38Bucks County, PAPA647,8281.9%–

39Bedford County, PAPA47,4801.8%–

40Susquehanna County, PAPA38,2371.8%–

41Fulton County, PAPA14,4831.8%–

42Montgomery County, PAPA877,6431.8%–

43Delaware County, PAPA580,9371.8%–

44Cambria County, PAPA128,9681.7%–

45Bradford County, PAPA59,6001.7%–

46Potter County, PAPA15,8971.7%–

47Somerset County, PAPA72,0041.6%–

48Elk County, PAPA29,9261.6%–

49Lebanon County, PAPA146,3801.5%–

50Lycoming County, PAPA112,5871.5%–

51Union County, PAPA42,3131.3%–

52Wyoming County, PAPA25,7901.3%–

53Montour County, PAPA17,8681.3%–

54Monroe County, PAPA167,1791.2%–

55Wayne County, PAPA51,7031.2%–

56Northampton County, PAPA324,4111.2%–

57Berks County, PAPA440,0721.1%–

58Northumberland County, PAPA89,9201.0%–

59Pike County, PAPA62,8081.0%–

60Lehigh County, PAPA384,3831.0%–

61Columbia County, PAPA66,1931.0%–

62Lackawanna County, PAPA216,5020.9%–

63Carbon County, PAPA65,8680.9%–

64Snyder County, PAPA39,6550.9%–

65Luzerne County, PAPA332,1260.8%–

66Philadelphia County, PAPA1,574,2810.7%–

67Schuylkill County, PAPA145,0850.5%–

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS