18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| St. Marys | 1 | 12,183 | 12,722 | -0.88% | 123 | 99.32 | City |
| Ridgway | 2 | 3,874 | 4,033 | -0.82% | 1,483 | 2.61 | Borough |
| Fox township | 3 | 3,442 | 3,572 | -0.95% | 51 | 67.18 | Township |
| Ridgway township | 4 | 2,349 | 2,422 | -0.59% | 27 | 86.89 | Township |
| Johnsonburg | 5 | 2,281 | 2,401 | -1.04% | 791 | 2.88 | Borough |
| Jay township | 6 | 1,856 | 1,957 | -1.17% | 27 | 67.70 | Township |
| Jones township | 7 | 1,511 | 1,568 | -0.79% | 10 | 144.78 | Township |
| Horton township | 8 | 1,286 | 1,359 | -1.23% | 23 | 57.01 | Township |
| Weedville | 9 | 679 | 460 | 1.34% | 348 | 1.95 | CDP |
| Kersey | 10 | 593 | 1,022 | -3.73% | 382 | 1.55 | CDP |
| Wilcox | 11 | 409 | 353 | 0.25% | 797 | 0.51 | CDP |
| Byrnedale | 12 | 398 | 588 | -0.5% | 318 | 1.25 | CDP |
| Highland township | 13 | 392 | 401 | -0.25% | 5 | 86.75 | Township |
| Force | 14 | 273 | 237 | 0.37% | 1,282 | 0.21 | CDP |
| Crenshaw | 15 | 266 | 320 | -4.66% | 243 | 1.09 | CDP |
| Benezette township | 16 | 212 | 218 | -0.47% | 2 | 106.67 | Township |
| James City | 17 | 171 | 250 | -3.93% | 244 | 0.70 | CDP |
| Millstone township | 18 | 90 | 95 | -1.1% | 2 | 41.47 | Township |
St. Marys is the largest city in Elk County, with a population of 12,183.
Millstone township is the smallest city in Elk County.
There are 18 cities in Elk County, Pennsylvania.