| Population Change 1990-2000 | ||||
| County or Municipality | 2000 Population | 1990 Population | Population Change | Percent Change |
| Pennsylvania | 12 281 054 | 11 881 643 | 399 411 | 3.4 |
| Philadelphia County | 1 517 550 | 1 585 577 | - 68 027 | - 4.3 |
| Philadelphia city | 1 517 550 | 1 585 577 | - 68 027 | - 4.3 |
| Source: U.S. Census Bureau | Prepared by: Pennsylvania State Data Center | |||