18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| St. Marys | 1 | 12,271 | 12,720 | -0.73% | 124 | 99 | City |
| Ridgway | 2 | 3,906 | 4,026 | -0.61% | 1,495 | 3 | Borough |
| Fox | 3 | 3,495 | 3,572 | -0.23% | 52 | 67 | Township |
| Ridgway | 4 | 2,374 | 2,425 | -0.21% | 27 | 87 | Township |
| Johnsonburg | 5 | 2,298 | 2,398 | -0.86% | 797 | 3 | Borough |
| Jay | 6 | 1,883 | 1,958 | -0.53% | 28 | 68 | Township |
| Jones | 7 | 1,536 | 1,568 | 0% | 11 | 145 | Township |
| Horton | 8 | 1,306 | 1,363 | -0.68% | 23 | 57 | Township |
| Weedville | 9 | 679 | 460 | 1.34% | 348 | 2 | CDP |
| Kersey | 10 | 593 | 1,022 | -3.73% | 382 | 2 | CDP |
| Wilcox | 11 | 409 | 353 | 0.25% | 797 | 1 | CDP |
| Byrnedale | 12 | 398 | 588 | -0.5% | 318 | 1 | CDP |
| Highland | 13 | 387 | 397 | -0.26% | 4 | 87 | Township |
| Force | 14 | 273 | 237 | 0.37% | 1,282 | 0 | CDP |
| Crenshaw | 15 | 266 | 320 | -4.66% | 243 | 1 | CDP |
| Benezette | 16 | 215 | 218 | 0% | 2 | 107 | Township |
| James City | 17 | 171 | 250 | -3.93% | 244 | 1 | CDP |
| Millstone | 18 | 92 | 95 | 0% | 2 | 41 | Township |
St. Marys is the largest city in Elk County, with a population of 12,271.
Millstone is the smallest city in Elk County, with a population of 92.
There are 18 cities in Elk County, Pennsylvania.