RANKING · 1990 CENSUS · 67 SHOWN OF 67

Least racially diverse, Pennsylvania counties · 1990

Pennsylvania counties with the lowest CensusEasy Diversity Score, where most residents share the same race or ethnicity (1990 ACS). This list covers the 67 counties in Pennsylvania that qualify, ranked against each other statewide. The median across all 67 is 6.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

RANKPLACESTATEPOPDIVERSITY SCOREVS –

01Jefferson County, PAPA43,2551–

02Somerset County, PAPA72,0042–

03Clearfield County, PAPA78,1002–

04Juniata County, PAPA23,4032–

05Mifflin County, PAPA46,1272–

06Elk County, PAPA29,9262–

07Bedford County, PAPA47,4802–

08Warren County, PAPA37,0382–

09Potter County, PAPA15,8972–

10Susquehanna County, PAPA38,2373–

11Perry County, PAPA46,8063–

12Clinton County, PAPA37,8703–

13Cameron County, PAPA4,2113–

14Wyoming County, PAPA25,7903–

15Northumberland County, PAPA89,9203–

16Armstrong County, PAPA63,6983–

17Bradford County, PAPA59,6003–

18Schuylkill County, PAPA145,0853–

19Columbia County, PAPA66,1933–

20Sullivan County, PAPA5,8563–

21Carbon County, PAPA65,8683–

22Fulton County, PAPA14,4833–

23Snyder County, PAPA39,6553–

24Clarion County, PAPA36,6803–

25Butler County, PAPA200,1694–

26Blair County, PAPA119,5414–

27Tioga County, PAPA40,5024–

28Venango County, PAPA49,3464–

29Lackawanna County, PAPA216,5024–

30Greene County, PAPA33,8854–

31Forest County, PAPA6,6145–

32Wayne County, PAPA51,7035–

33Crawford County, PAPA81,7925–

34Luzerne County, PAPA332,1266–

35Montour County, PAPA17,8686–

36Indiana County, PAPA82,8786–

37Westmoreland County, PAPA349,3247–

38McKean County, PAPA38,9847–

39Cambria County, PAPA128,9687–

40Adams County, PAPA107,5948–

41Lycoming County, PAPA112,5878–

42Cumberland County, PAPA277,2709–

43Lebanon County, PAPA146,3809–

44Franklin County, PAPA160,6529–

45Lawrence County, PAPA83,9119–

46Fayette County, PAPA123,02110–

47Washington County, PAPA210,80210–

48Pike County, PAPA62,80811–

49Union County, PAPA42,31312–

50Monroe County, PAPA167,17912–

51York County, PAPA473,19713–

52Huntingdon County, PAPA43,00113–

53Mercer County, PAPA107,86013–

54Bucks County, PAPA647,82814–

55Beaver County, PAPA166,03215–

56Centre County, PAPA157,39315–

57Lancaster County, PAPA563,15916–

58Erie County, PAPA265,83216–

59Northampton County, PAPA324,41118–

60Berks County, PAPA440,07220–

61Lehigh County, PAPA384,38321–

62Montgomery County, PAPA877,64322–

63Chester County, PAPA557,11622–

64Allegheny County, PAPA1,225,03528–

65Delaware County, PAPA580,93731–

66Dauphin County, PAPA293,35139–

67Philadelphia County, PAPA1,574,28171–

SHOWING 1–67 OF 67

Download CSV (full list, 67 rows)How this score is calculated

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