| 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 |
| Wyoming County | 28 080 | 28 076 | 4 | 0.0 |
| Braintrim township | 508 | 465 | 43 | 9.2 |
| Clinton township | 1 343 | 1 063 | 280 | 26.3 |
| Eaton township | 1 644 | 1 600 | 44 | 2.8 |
| Exeter township | 748 | 763 | - 15 | - 2.0 |
| Factoryville borough | 1 144 | 1 310 | - 166 | - 12.7 |
| Falls township | 1 997 | 2 055 | - 58 | - 2.8 |
| Forkston township | 386 | 316 | 70 | 22.2 |
| Laceyville borough | 396 | 436 | - 40 | - 9.2 |
| Lemon township | 1 189 | 1 264 | - 75 | - 5.9 |
| Mehoopany township | 993 | 888 | 105 | 11.8 |
| Meshoppen borough | 459 | 439 | 20 | 4.6 |
| Meshoppen township | 877 | 879 | - 2 | - 0.2 |
| Monroe township | 1 836 | 1 802 | 34 | 1.9 |
| Nicholson borough | 713 | 857 | - 144 | - 16.8 |
| Nicholson township | 1 361 | 1 287 | 74 | 5.7 |
| North Branch township | 197 | 168 | 29 | 17.3 |
| Northmoreland township | 1 463 | 1 462 | 1 | 0.1 |
| Noxen township | 951 | 944 | 7 | 0.7 |
| Overfield township | 1 532 | 1 466 | 66 | 4.5 |
| Tunkhannock borough | 1 911 | 2 251 | - 340 | - 15.1 |
| Tunkhannock township | 4 298 | 4 371 | - 73 | - 1.7 |
| Washington township | 1 306 | 1 212 | 94 | 7.8 |
| Windham township | 828 | 778 | 50 | 6.4 |
| Source: U.S. Census Bureau | Prepared by: Pennsylvania State Data Center | |||