Pennsylvania Counties by Population (2026)
by Kristen Carney
Updated: February 9, 2026
The most populous counties in Pennsylvania are Philadelphia County with 1,579,706, Allegheny County at 1,238,177, Montgomery County with 867,573, Bucks County at 647,461, and Delaware County with 579,222. You can get the most current Census population data for all 67 Pennsylvania counties, sorted from the most populous counties in Pennsylvania to the least, according to the 2024 American Community Survey.
Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Pennsylvania counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!
| Rank | County | Population |
|---|---|---|
| 1 | Philadelphia County | 1,579,706 |
| 2 | Allegheny County | 1,238,177 |
| 3 | Montgomery County | 867,573 |
| 4 | Bucks County | 647,461 |
| 5 | Delaware County | 579,222 |
| 6 | Lancaster County | 557,931 |
| 7 | Chester County | 547,840 |
| 8 | York County | 462,924 |
| 9 | Berks County | 433,015 |
| 10 | Lehigh County | 378,792 |
| 11 | Westmoreland County | 352,500 |
| 12 | Luzerne County | 327,675 |
| 13 | Northampton County | 318,580 |
| 14 | Dauphin County | 289,593 |
| 15 | Erie County | 269,052 |
| 16 | Cumberland County | 268,323 |
| 17 | Lackawanna County | 216,146 |
| 18 | Washington County | 210,042 |
| 19 | Butler County | 197,254 |
| 20 | Monroe County | 167,515 |
| 21 | Beaver County | 166,324 |
| 22 | Centre County | 158,576 |
| 23 | Franklin County | 157,379 |
| 24 | Lebanon County | 144,186 |
| 25 | Schuylkill County | 143,558 |
| 26 | Cambria County | 131,538 |
| 27 | Fayette County | 125,997 |
| 28 | Blair County | 121,277 |
| 29 | Lycoming County | 113,489 |
| 30 | Mercer County | 109,257 |
| 31 | Adams County | 106,115 |
| 32 | Northumberland County | 90,560 |
| 33 | Lawrence County | 85,024 |
| 34 | Indiana County | 83,042 |
| 35 | Crawford County | 82,716 |
| 36 | Clearfield County | 78,635 |
| 37 | Somerset County | 72,799 |
| 38 | Carbon County | 65,382 |
| 39 | Columbia County | 65,362 |
| 40 | Armstrong County | 64,622 |
| 41 | Pike County | 60,621 |
| 42 | Bradford County | 59,858 |
| 43 | Wayne County | 51,262 |
| 44 | Venango County | 49,801 |
| 45 | Bedford County | 47,513 |
| 46 | Perry County | 46,239 |
| 47 | Mifflin County | 46,041 |
| 48 | Jefferson County | 43,864 |
| 49 | Huntingdon County | 43,653 |
| 50 | Union County | 42,456 |
| 51 | Tioga County | 40,945 |
| 52 | McKean County | 39,904 |
| 53 | Snyder County | 39,668 |
| 54 | Susquehanna County | 38,219 |
| 55 | Warren County | 37,920 |
| 56 | Clinton County | 37,798 |
| 57 | Clarion County | 37,179 |
| 58 | Greene County | 34,835 |
| 59 | Elk County | 30,506 |
| 60 | Wyoming County | 25,967 |
| 61 | Juniata County | 23,379 |
| 62 | Montour County | 18,103 |
| 63 | Potter County | 16,188 |
| 64 | Fulton County | 14,531 |
| 65 | Forest County | 6,715 |
| 66 | Sullivan County | 5,888 |
| 67 | Cameron County | 4,427 |
|
United States Census Bureau. B01001 SEX BY AGE, 2024 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. January 29, 2026. http://www.census.gov/. |
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