Ranking of Pennsylvania Counties By Total Population from Census 2020
Updated on February 7, 2023.
According to the data from the US 2020 Census, the most populated Pennsylvania county as at April 2020 was Philadelphia County (1.60M), followed by Allegheny County (1.25M), and Montgomery County (856.55K).
The chart below shows the top 10 most populated counties, and the table below shows the ranking of all the counties in the state of Pennsylvania.
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 Population from Census 2020
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| Rank | County | Population |
|---|---|---|
| 1 | Philadelphia County | 1603797 |
| 2 | Allegheny County | 1250578 |
| 3 | Montgomery County | 856553 |
| 4 | Bucks County | 646538 |
| 5 | Delaware County | 576830 |
| 6 | Lancaster County | 552984 |
| 7 | Chester County | 534413 |
| 8 | York County | 456438 |
| 9 | Berks County | 428849 |
| 10 | Lehigh County | 374557 |
| 11 | Westmoreland County | 354663 |
| 12 | Luzerne County | 325594 |
| 13 | Northampton County | 312951 |
| 14 | Dauphin County | 286401 |
| 15 | Erie County | 270876 |
| 16 | Cumberland County | 259469 |
| 17 | Lackawanna County | 215896 |
| 18 | Washington County | 209349 |
| 19 | Butler County | 193763 |
| 20 | Monroe County | 168327 |
| 21 | Beaver County | 168215 |
| 22 | Centre County | 158172 |
| 23 | Franklin County | 155932 |
| 24 | Lebanon County | 143257 |
| 25 | Schuylkill County | 143049 |
| 26 | Cambria County | 133472 |
| 27 | Fayette County | 128804 |
| 28 | Blair County | 122822 |
| 29 | Lycoming County | 114188 |
| 30 | Mercer County | 110652 |
| 31 | Adams County | 103852 |
| 32 | Northumberland County | 91647 |
| 33 | Lawrence County | 86070 |
| 34 | Crawford County | 83938 |
| 35 | Indiana County | 83246 |
| 36 | Clearfield County | 80562 |
| 37 | Somerset County | 74129 |
| 38 | Armstrong County | 65558 |
| 39 | Carbon County | 64749 |
| 40 | Columbia County | 64727 |
| 41 | Bradford County | 59967 |
| 42 | Pike County | 58535 |
| 43 | Wayne County | 51155 |
| 44 | Venango County | 50454 |
| 45 | Bedford County | 47577 |
| 46 | Mifflin County | 46143 |
| 47 | Perry County | 45842 |
| 48 | Jefferson County | 44492 |
| 49 | Huntingdon County | 44092 |
| 50 | Union County | 42681 |
| 51 | Tioga County | 41045 |
| 52 | McKean County | 40432 |
| 53 | Snyder County | 39736 |
| 54 | Warren County | 38587 |
| 55 | Susquehanna County | 38434 |
| 56 | Clinton County | 37450 |
| 57 | Clarion County | 37241 |
| 58 | Greene County | 35954 |
| 59 | Elk County | 30990 |
| 60 | Wyoming County | 26069 |
| 61 | Juniata County | 23509 |
| 62 | Montour County | 18136 |
| 63 | Potter County | 16396 |
| 64 | Fulton County | 14556 |
| 65 | Forest County | 6973 |
| 66 | Sullivan County | 5840 |
| 67 | Cameron County | 4547 |