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 (2023 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.

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 SHAREVS 2000

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