1 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Philadelphia | 1 | 1,567,198 | 1,600,788 | -0.43% | 11,665 | 134 | City |
Philadelphia is the largest city in Philadelphia County, with a population of 1,567,198.
Philadelphia is the smallest city in Philadelphia County, with a population of 1,567,198.
There is 1 city in Philadelphia County, Pennsylvania.