| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Salisbury | 1 | 13,675 | 13,620 | -0.23% | 1,223 | 11 | Township |
| Somerset | 2 | 11,677 | 12,058 | 0.27% | 182 | 64 | Township |
| Salisbury | 3 | 11,614 | 11,513 | 0.14% | 278 | 42 | Township |
| Conemaugh | 4 | 6,550 | 6,743 | -0.2% | 159 | 41 | Township |
| Somerset | 5 | 5,771 | 6,024 | -0.76% | 2,115 | 3 | Borough |
| Windber | 6 | 3,749 | 3,926 | -0.82% | 1,905 | 2 | Borough |
| Jenner | 7 | 3,548 | 3,700 | -0.62% | 55 | 65 | Township |
| Paint | 8 | 2,996 | 3,041 | -0.1% | 93 | 32 | Township |
| Somerset | 9 | 2,534 | 2,553 | -0.16% | 79 | 32 | Township |
| Berlin | 10 | 2,464 | 2,481 | 0% | 64 | 38 | Township |
| Shade | 11 | 2,361 | 2,455 | -0.55% | 34 | 69 | Township |
| Brothersvalley | 12 | 2,317 | 2,362 | -0.09% | 37 | 63 | Township |
| Elk Lick | 13 | 2,181 | 2,254 | -0.73% | 38 | 57 | Township |
| Summit | 14 | 2,089 | 2,154 | -0.48% | 46 | 45 | Township |
| Stonycreek | 15 | 2,078 | 2,092 | -0.14% | 34 | 61 | Township |
| Meyersdale | 16 | 1,971 | 2,057 | -0.76% | 2,415 | 1 | Borough |
| Berlin | 17 | 1,945 | 2,010 | -0.56% | 2,123 | 1 | Borough |
| Quemahoning | 18 | 1,785 | 1,845 | -0.56% | 51 | 35 | Township |
| Lincoln | 19 | 1,419 | 1,460 | -0.28% | 55 | 26 | Township |
| Boswell | 20 | 1,191 | 1,223 | -0.5% | 1,612 | 1 | Borough |
| Upper Turkeyfoot | 21 | 1,032 | 1,063 | -0.39% | 27 | 39 | Township |
| Central City | 22 | 946 | 989 | -0.84% | 1,752 | 1 | Borough |
| Addison | 23 | 913 | 930 | -0.22% | 15 | 61 | Township |
| Black | 24 | 906 | 896 | 0.33% | 21 | 43 | Township |
| Rockwood | 25 | 804 | 840 | -0.86% | 2,407 | 0 | Borough |
| Middlecreek | 26 | 796 | 830 | -0.62% | 24 | 33 | Township |
| Confluence | 27 | 700 | 723 | -0.71% | 438 | 2 | Borough |
| Salisbury | 28 | 675 | 707 | -0.88% | 1,762 | 0 | Borough |
| Jennerstown | 29 | 653 | 676 | -0.61% | 340 | 2 | Borough |
| Allegheny | 30 | 614 | 620 | 0% | 12 | 51 | Township |
| Hooversville | 31 | 600 | 628 | -0.83% | 982 | 1 | Borough |
| Lower Turkeyfoot | 32 | 539 | 549 | -0.19% | 15 | 36 | Township |
| Ogle | 33 | 471 | 476 | -0.21% | 14 | 35 | Township |
| Garrett | 34 | 406 | 418 | -0.49% | 802 | 1 | Borough |
| Indian Lake | 35 | 377 | 379 | 0% | 106 | 4 | Borough |
| Stoystown | 36 | 284 | 297 | -0.7% | 1,495 | 0 | Borough |
| Ursina | 37 | 226 | 236 | -0.88% | 251 | 1 | Borough |
| Addison | 38 | 225 | 168 | 4.65% | 414 | 1 | Borough |
| Wellersburg | 39 | 204 | 214 | -0.97% | 252 | 1 | Borough |
| Shanksville | 40 | 187 | 196 | -1.06% | 949 | 0 | Borough |
| Benson | 41 | 175 | 184 | -1.13% | 494 | 0 | Borough |
| Gray | 42 | 170 | 182 | -1.16% | 40 | 4 | Township |
| New Baltimore | 43 | 133 | 139 | -0.75% | 383 | 0 | Borough |
| Fairhope | 44 | 98 | 102 | -1.01% | 7.0 | 15 | Township |
| Callimont | 45 | 47 | 50 | -2.08% | 11 | 4 | Borough |
Salisbury is the largest city in Somerset County, with a population of 13,675.
Callimont is the smallest city in Somerset County, with a population of 47.
There are 45 cities in Somerset County, Pennsylvania.