| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| St. Marys | 1 | 12,154 | 12,714 | -0.81% | 122 | 99 | City |
| Ridgway | 2 | 3,865 | 4,020 | -0.72% | 1,480 | 3 | Borough |
| Fox | 3 | 3,490 | 3,572 | -0.14% | 52 | 67 | Township |
| Ridgway | 4 | 2,377 | 2,436 | -0.29% | 27 | 87 | Township |
| Johnsonburg | 5 | 2,269 | 2,393 | -0.96% | 787 | 3 | Borough |
| Jay | 6 | 1,872 | 1,960 | -0.64% | 28 | 68 | Township |
| Jones | 7 | 1,524 | 1,572 | -0.39% | 11 | 145 | Township |
| Horton | 8 | 1,300 | 1,363 | -0.69% | 23 | 57 | Township |
| Highland | 9 | 389 | 399 | 0% | 4.0 | 87 | Township |
| Benezette | 10 | 215 | 218 | 0% | 2.0 | 107 | Township |
| Millstone | 11 | 89 | 94 | -1.11% | 2.0 | 41 | Township |
St. Marys is the largest city in Elk County, with a population of 12,154.
Millstone is the smallest city in Elk County, with a population of 89.
There are 11 cities in Elk County, Pennsylvania.