| 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 |
| Clearfield County | 83 382 | 78 097 | 5 285 | 6.8 |
| Beccaria township | 1 835 | 1 917 | - 82 | - 4.3 |
| Bell township | 825 | 925 | - 100 | - 10.8 |
| Bigler township | 1 368 | 1 391 | - 23 | - 1.7 |
| Bloom township | 412 | 454 | - 42 | - 9.3 |
| Boggs township | 1 837 | 1 907 | - 70 | - 3.7 |
| Bradford township | 3 314 | 2 504 | 810 | 32.3 |
| Brady township | 2 010 | 2 023 | - 13 | - 0.6 |
| Brisbin borough | 413 | 369 | 44 | 11.9 |
| Burnside borough | 283 | 350 | - 67 | - 19.1 |
| Burnside township | 1 128 | 1 137 | - 9 | - 0.8 |
| Chest township | 547 | 565 | - 18 | - 3.2 |
| Chester Hill borough | 918 | 945 | - 27 | - 2.9 |
| Clearfield borough | 6 631 | 6 633 | - 2 | 0.0 |
| Coalport borough | 490 | 578 | - 88 | - 15.2 |
| Cooper township | 2 731 | 2 590 | 141 | 5.4 |
| Covington township | 621 | 648 | - 27 | - 4.2 |
| Curwensville borough | 2 650 | 2 924 | - 274 | - 9.4 |
| Decatur township | 2 974 | 3 004 | - 30 | - 1.0 |
| DuBois city | 8 123 | 8 286 | - 163 | - 2.0 |
| Falls Creek borough | 44 | 54 | - 10 | - 18.5 |
| Ferguson township | 410 | 437 | - 27 | - 6.2 |
| Girard township | 674 | 630 | 44 | 7.0 |
| Glen Hope borough | 149 | 187 | - 38 | - 20.3 |
| Goshen township | 496 | 346 | 150 | 43.4 |
| Graham township | 1 236 | 1 231 | 5 | 0.4 |
| Grampian borough | 441 | 395 | 46 | 11.6 |
| Greenwood township | 424 | 415 | 9 | 2.2 |
| Gulich township | 1 275 | 1 192 | 83 | 7.0 |
| Houtzdale borough | 941 | 1 204 | - 263 | - 21.8 |
| Huston township | 1 468 | 1 352 | 116 | 8.6 |
| Irvona borough | 680 | 666 | 14 | 2.1 |
| Jordan township | 543 | 533 | 10 | 1.9 |
| Karthaus township | 811 | 547 | 264 | 48.3 |
| Knox township | 705 | 704 | 1 | 0.1 |
| Lawrence township | 7 712 | 8 000 | - 288 | - 3.6 |
| Lumber City borough | 86 | 83 | 3 | 3.6 |
| Mahaffey borough | 402 | 341 | 61 | 17.9 |
| Morris township | 3 063 | 2 680 | 383 | 14.3 |
| Newburg borough | 81 | 117 | - 36 | - 30.8 |
| New Washington borough | 89 | 78 | 11 | 14.1 |
| Osceola Mills borough | 1 249 | 1 310 | - 61 | - 4.7 |
| Penn township | 1 326 | 1 372 | - 46 | - 3.4 |
| Pike township | 2 309 | 2 044 | 265 | 13.0 |
| Pine township | 77 | 43 | 34 | 79.1 |
| Ramey borough | 525 | 536 | - 11 | - 2.1 |
| Sandy township | 11 556 | 9 005 | 2 551 | 28.3 |
| Troutville borough | 224 | 226 | - 2 | - 0.9 |
| Union township | 918 | 833 | 85 | 10.2 |
| Wallaceton borough | 350 | 319 | 31 | 9.7 |
| Westover borough | 458 | 446 | 12 | 2.7 |
| Woodward township | 3 550 | 1 621 | 1 929 | 119.0 |
| Source: U.S. Census Bureau | Prepared by: Pennsylvania State Data Center | |||