Ranking of Pennsylvania Counties By Population in 2016
Updated on June 21, 2025.
Based on the US Census Vintage data estimates, in 2016, the Population for Pennsylvania was 12.79M. Among all Pennsylvania counties, Philadelphia County had the highest population (1.58M), followed by Allegheny County (1.23M), and Montgomery County (820.11K).
The chart below shows the top 10 counties, and the table below shows the ranking of all Pennsylvania counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: Pennsylvania Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2016 Census.
See this for other years:
Ranking of Pennsylvania Counties By Population in 2016
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| Rank | County | Population |
|---|---|---|
| 1 | Philadelphia County | 1576604 |
| 2 | Allegheny County | 1226893 |
| 3 | Montgomery County | 820106 |
| 4 | Bucks County | 626369 |
| 5 | Delaware County | 563860 |
| 6 | Lancaster County | 538303 |
| 7 | Chester County | 516768 |
| 8 | York County | 444012 |
| 9 | Berks County | 415911 |
| 10 | Lehigh County | 362357 |
| 11 | Westmoreland County | 354763 |
| 12 | Luzerne County | 317192 |
| 13 | Northampton County | 301629 |
| 14 | Erie County | 276639 |
| 15 | Dauphin County | 274305 |
| 16 | Cumberland County | 247633 |
| 17 | Lackawanna County | 211108 |
| 18 | Washington County | 207469 |
| 19 | Butler County | 186427 |
| 20 | Beaver County | 166926 |
| 21 | Monroe County | 166324 |
| 22 | Centre County | 162287 |
| 23 | Franklin County | 153938 |
| 24 | Schuylkill County | 143492 |
| 25 | Lebanon County | 138481 |
| 26 | Cambria County | 134517 |
| 27 | Fayette County | 132371 |
| 28 | Blair County | 123779 |
| 29 | Lycoming County | 114958 |
| 30 | Mercer County | 112651 |
| 31 | Adams County | 101952 |
| 32 | Northumberland County | 92336 |
| 33 | Lawrence County | 87379 |
| 34 | Crawford County | 86353 |
| 35 | Indiana County | 85243 |
| 36 | Clearfield County | 80190 |
| 37 | Somerset County | 74890 |
| 38 | Armstrong County | 66464 |
| 39 | Columbia County | 66171 |
| 40 | Carbon County | 63561 |
| 41 | Bradford County | 61103 |
| 42 | Pike County | 55040 |
| 43 | Venango County | 52487 |
| 44 | Wayne County | 51350 |
| 45 | Bedford County | 48592 |
| 46 | Mifflin County | 46289 |
| 47 | Perry County | 45937 |
| 48 | Union County | 45527 |
| 49 | Huntingdon County | 45411 |
| 50 | Jefferson County | 44041 |
| 51 | McKean County | 41701 |
| 52 | Tioga County | 41295 |
| 53 | Susquehanna County | 41268 |
| 54 | Snyder County | 40457 |
| 55 | Warren County | 40039 |
| 56 | Clinton County | 39009 |
| 57 | Clarion County | 38607 |
| 58 | Greene County | 37222 |
| 59 | Elk County | 30516 |
| 60 | Wyoming County | 27557 |
| 61 | Juniata County | 24554 |
| 62 | Montour County | 18241 |
| 63 | Potter County | 16953 |
| 64 | Fulton County | 14502 |
| 65 | Forest County | 7334 |
| 66 | Sullivan County | 6123 |
| 67 | Cameron County | 4702 |
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