45 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Salisbury | 1 | 14,098 | 13,627 | 1% | 1,261 | 11 | Township |
| Somerset | 2 | 12,016 | 12,062 | 1.82% | 187 | 64 | Township |
| Salisbury | 3 | 11,570 | 11,494 | 0.04% | 277 | 42 | Township |
| Conemaugh | 4 | 6,541 | 6,749 | -0.38% | 158 | 41 | Township |
| Somerset | 5 | 5,783 | 6,044 | -0.74% | 2,119 | 3 | Borough |
| Windber | 6 | 3,747 | 3,927 | -0.79% | 1,904 | 2 | Borough |
| Jenner | 7 | 3,527 | 3,701 | -0.73% | 55 | 65 | Township |
| Paint | 8 | 2,985 | 3,039 | -0.27% | 93 | 32 | Township |
| Somerset | 9 | 2,540 | 2,564 | -0.2% | 79 | 32 | Township |
| Berlin | 10 | 2,439 | 2,483 | -0.41% | 63 | 38 | Township |
| Shade | 11 | 2,348 | 2,449 | -0.72% | 34 | 69 | Township |
| Brothersvalley | 12 | 2,308 | 2,374 | -0.52% | 37 | 63 | Township |
| Elk Lick | 13 | 2,201 | 2,261 | -0.32% | 39 | 57 | Township |
| Summit | 14 | 2,065 | 2,138 | -0.58% | 46 | 45 | Township |
| Stonycreek | 15 | 2,044 | 2,087 | -0.73% | 33 | 61 | Township |
| Meyersdale | 16 | 1,976 | 2,068 | -0.75% | 2,422 | 1 | Borough |
| Berlin | 17 | 1,922 | 1,997 | -0.62% | 2,098 | 1 | Borough |
| Quemahoning | 18 | 1,768 | 1,839 | -0.67% | 50 | 35 | Township |
| Lincoln | 19 | 1,415 | 1,452 | -0.14% | 55 | 26 | Township |
| Boswell | 20 | 1,185 | 1,221 | -0.5% | 1,604 | 1 | Borough |
| Upper Turkeyfoot | 21 | 1,034 | 1,063 | -0.19% | 27 | 39 | Township |
| Central City | 22 | 953 | 1,000 | -0.83% | 1,765 | 1 | Borough |
| Black | 23 | 906 | 897 | 0.55% | 21 | 43 | Township |
| Addison | 24 | 901 | 927 | -0.55% | 15 | 61 | Township |
| Rockwood | 25 | 809 | 841 | -0.61% | 2,422 | 0 | Borough |
| Middlecreek | 26 | 792 | 830 | -0.75% | 24 | 33 | Township |
| Confluence | 27 | 689 | 724 | -0.86% | 431 | 2 | Borough |
| Salisbury | 28 | 672 | 704 | -0.74% | 1,755 | 0 | Borough |
| Jennerstown | 29 | 657 | 678 | -0.45% | 342 | 2 | Borough |
| Allegheny | 30 | 603 | 617 | -0.33% | 12 | 51 | Township |
| Hooversville | 31 | 597 | 627 | -0.83% | 977 | 1 | Borough |
| Lower Turkeyfoot | 32 | 537 | 545 | 0.19% | 15 | 36 | Township |
| Ogle | 33 | 466 | 476 | -0.64% | 13 | 35 | Township |
| Garrett | 34 | 408 | 416 | -0.24% | 806 | 1 | Borough |
| Indian Lake | 35 | 390 | 390 | 0% | 109 | 4 | Borough |
| Stoystown | 36 | 285 | 297 | -0.7% | 1,500 | 0 | Borough |
| Ursina | 37 | 230 | 241 | -0.86% | 256 | 1 | Borough |
| Addison | 38 | 225 | 167 | 4.65% | 414 | 1 | Borough |
| Wellersburg | 39 | 203 | 214 | -0.98% | 251 | 1 | Borough |
| Shanksville | 40 | 187 | 196 | -0.53% | 949 | 0 | Borough |
| Benson | 41 | 176 | 185 | -0.56% | 497 | 0 | Borough |
| Gray | 42 | 166 | 181 | -1.78% | 39 | 4 | Township |
| New Baltimore | 43 | 131 | 137 | -0.76% | 378 | 0 | Borough |
| Fairhope | 44 | 98 | 102 | -1.01% | 7 | 15 | Township |
| Callimont | 45 | 52 | 55 | 0% | 12 | 4 | Borough |
Salisbury is the largest city in Somerset County, with a population of 14,098.
Callimont is the smallest city in Somerset County, with a population of 52.
There are 45 cities in Somerset County, Pennsylvania.