| 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 |
| Forest County | 4 946 | 4 802 | 144 | 3.0 |
| Barnett township | 349 | 400 | - 51 | - 12.8 |
| Green township | 397 | 335 | 62 | 18.5 |
| Harmony township | 511 | 499 | 12 | 2.4 |
| Hickory township | 525 | 513 | 12 | 2.3 |
| Howe township | 417 | 300 | 117 | 39.0 |
| Jenks township | 1 261 | 1 321 | - 60 | - 4.5 |
| Kingsley township | 261 | 218 | 43 | 19.7 |
| Tionesta borough | 615 | 634 | - 19 | - 3.0 |
| Tionesta township | 610 | 582 | 28 | 4.8 |
| Source: U.S. Census Bureau | Prepared by: Pennsylvania State Data Center | |||