40 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lock Haven | 1 | 8,699 | 8,093 | 1.41% | 3,485 | 2.50 | City |
| Pine Creek township | 2 | 3,348 | 3,408 | -0.56% | 232 | 14.41 | Township |
| Lamar township | 3 | 2,569 | 2,614 | -0.46% | 63 | 40.89 | Township |
| Bald Eagle township | 4 | 1,996 | 2,036 | -0.55% | 48 | 41.63 | Township |
| Greene township | 5 | 1,781 | 1,764 | 0% | 38 | 46.77 | Township |
| Porter township | 6 | 1,478 | 1,488 | -0.4% | 58 | 25.56 | Township |
| Avis | 7 | 1,452 | 1,471 | -0.27% | 2,933 | 0.49 | Borough |
| Mill Hall | 8 | 1,451 | 1,473 | -0.27% | 1,575 | 0.92 | Borough |
| Flemington | 9 | 1,259 | 1,268 | -0.16% | 2,761 | 0.46 | Borough |
| Dunnstown | 10 | 1,176 | 1,291 | -1.01% | 1,431 | 0.82 | CDP |
| Castanea | 11 | 1,140 | 1,005 | 0.09% | 836 | 1.36 | CDP |
| Castanea township | 12 | 1,078 | 1,099 | -0.55% | 196 | 5.51 | Township |
| McElhattan | 13 | 1,049 | 1,171 | 2.94% | 292 | 3.59 | CDP |
| Renovo | 14 | 1,040 | 1,057 | -0.29% | 990 | 1.05 | Borough |
| Dunnstable township | 15 | 993 | 1,008 | -0.6% | 106 | 9.38 | Township |
| Crawford township | 16 | 972 | 972 | -0.1% | 44 | 22.12 | Township |
| Beech Creek township | 17 | 949 | 970 | -0.63% | 10 | 95.89 | Township |
| Chapman township | 18 | 883 | 890 | -0.23% | 9 | 100.08 | Township |
| Logan township | 19 | 872 | 875 | -0.23% | 36 | 24.18 | Township |
| Rote | 20 | 728 | 580 | 1.96% | 648 | 1.12 | CDP |
| Woolrich | 21 | 728 | 832 | 7.22% | 614 | 1.19 | CDP |
| Beech Creek | 22 | 726 | 738 | -0.27% | 1,339 | 0.54 | Borough |
| Lamar | 23 | 661 | 635 | 1.07% | 482 | 1.37 | CDP |
| Rauchtown | 24 | 630 | 568 | -0.94% | 354 | 1.78 | CDP |
| Farwell | 25 | 507 | 352 | 6.96% | 1,367 | 0.37 | CDP |
| Loganton | 26 | 461 | 466 | -0.22% | 438 | 1.05 | Borough |
| South Renovo | 27 | 400 | 405 | -0.25% | 1,961 | 0.20 | Borough |
| Salona | 28 | 396 | 372 | 7.03% | 392 | 1.01 | CDP |
| Gallagher township | 29 | 392 | 390 | 0% | 7 | 53.72 | Township |
| Oval | 30 | 386 | 410 | 0.52% | 352 | 1.10 | CDP |
| North Bend | 31 | 361 | 264 | 7.12% | 608 | 0.59 | CDP |
| Noyes township | 32 | 333 | 334 | -0.3% | 4 | 88.89 | Township |
| Salladasburg | 33 | 243 | 250 | -0.41% | 313 | 0.78 | Borough |
| Tylersville | 34 | 225 | 157 | 7.14% | 166 | 1.35 | CDP |
| Colebrook township | 35 | 196 | 198 | -0.51% | 11 | 18.13 | Township |
| Clintondale | 36 | 161 | 146 | 7.33% | 419 | 0.38 | CDP |
| Leidy township | 37 | 156 | 156 | 0% | 2 | 96.54 | Township |
| Grugan township | 38 | 47 | 47 | 0% | 1 | 68.27 | Township |
| West Keating township | 39 | 16 | 16 | 0% | 0.00 | 38.13 | Township |
| East Keating township | 40 | 9 | 9 | 0% | 0.00 | 50.66 | Township |
Lock Haven is the largest city in Clinton County, with a population of 8,699.
East Keating township is the smallest city in Clinton County.
There are 40 cities in Clinton County, Pennsylvania.