Ranking of Pennsylvania Counties By Total Voting-age Population (18yrs and over) from Census 2020
Updated on August 22, 2023.
According to the data from the US 2020 Census, as at April 2020, among all the counties in Pennsylvania, Philadelphia County had the highest voting-age population (18 years and over) (1.28M), followed by Allegheny County (1.02M), and Montgomery County (674.02K).
The chart below shows the top 10 counties with high voting-age population, and the table below shows the ranking of all Pennsylvania counties based on voting-age population.
You can also see the ranking of counties by population for other states as well as for the whole United States.
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Related Topics: Pennsylvania Census 2020 Topic List.
Data Source: US Census Bureau, 2020 Census.
Ranking of Pennsylvania Counties By Total Voting-age Population from Census 2020
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| Rank | County | Voting-age Population |
|---|---|---|
| 1 | Philadelphia County | 1278362 |
| 2 | Allegheny County | 1020183 |
| 3 | Montgomery County | 674024 |
| 4 | Bucks County | 515340 |
| 5 | Delaware County | 449790 |
| 6 | Lancaster County | 425314 |
| 7 | Chester County | 412886 |
| 8 | York County | 356368 |
| 9 | Berks County | 333658 |
| 10 | Lehigh County | 291935 |
| 11 | Westmoreland County | 289614 |
| 12 | Luzerne County | 262455 |
| 13 | Northampton County | 251676 |
| 14 | Dauphin County | 224493 |
| 15 | Erie County | 214341 |
| 16 | Cumberland County | 206533 |
| 17 | Lackawanna County | 173597 |
| 18 | Washington County | 169191 |
| 19 | Butler County | 155325 |
| 20 | Beaver County | 136115 |
| 21 | Centre County | 134439 |
| 22 | Monroe County | 134271 |
| 23 | Franklin County | 120964 |
| 24 | Schuylkill County | 115932 |
| 25 | Lebanon County | 111234 |
| 26 | Cambria County | 108388 |
| 27 | Fayette County | 104708 |
| 28 | Blair County | 98475 |
| 29 | Lycoming County | 90800 |
| 30 | Mercer County | 89028 |
| 31 | Adams County | 83005 |
| 32 | Northumberland County | 73275 |
| 33 | Lawrence County | 69056 |
| 34 | Indiana County | 67726 |
| 35 | Crawford County | 66608 |
| 36 | Clearfield County | 65948 |
| 37 | Somerset County | 60695 |
| 38 | Armstrong County | 53182 |
| 39 | Columbia County | 53098 |
| 40 | Carbon County | 52290 |
| 41 | Pike County | 47447 |
| 42 | Bradford County | 46941 |
| 43 | Wayne County | 42587 |
| 44 | Venango County | 40320 |
| 45 | Bedford County | 38284 |
| 46 | Huntingdon County | 36075 |
| 47 | Mifflin County | 36057 |
| 48 | Perry County | 35917 |
| 49 | Jefferson County | 35246 |
| 50 | Union County | 34680 |
| 51 | Tioga County | 32720 |
| 52 | McKean County | 32321 |
| 53 | Snyder County | 31144 |
| 54 | Warren County | 31105 |
| 55 | Susquehanna County | 30923 |
| 56 | Clarion County | 29966 |
| 57 | Clinton County | 29598 |
| 58 | Greene County | 29272 |
| 59 | Elk County | 25229 |
| 60 | Wyoming County | 21073 |
| 61 | Juniata County | 18343 |
| 62 | Montour County | 14393 |
| 63 | Potter County | 13140 |
| 64 | Fulton County | 11514 |
| 65 | Forest County | 6323 |
| 66 | Sullivan County | 4857 |
| 67 | Cameron County | 3751 |