| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Slavnovo | city | Kostromskaya Oblast' | Russia | 57.9166667 | 41.6166667 | 449 | 921 |
| Slepovskoye | city | Kostromskaya Oblast' | Russia | 58.7833333 | 44.6 | 587 | 215 |
| Slezneva-Borok | city | Kostromskaya Oblast' | Russia | 58.3525 | 41.6563889 | 380 | 252 |
| Sloboda | city | Kostromskaya Oblast' | Russia | 58.5 | 41.1833333 | 593 | 252 |
| Sloboda | city | Kostromskaya Oblast' | Russia | 57.9 | 41.25 | 528 | 1719 |
| Sloboda | city | Kostromskaya Oblast' | Russia | 57.9 | 41.7166667 | 574 | 924 |
| Sloboda Metallistov | city | Kostromskaya Oblast' | Russia | 57.7666667 | 40.9 | 285 | 126239 |
| Sloboda Morunikha | city | Kostromskaya Oblast' | Russia | 57.3 | 40.5 | 439 | 1219 |
| Slobodka | city | Kostromskaya Oblast' | Russia | 57.7833333 | 41.4 | 495 | 925 |
| Slonova | city | Kostromskaya Oblast' | Russia | 58.2 | 42.8166667 | 646 | 369 |
| Slovinka | city | Kostromskaya Oblast' | Russia | 58.0313889 | 43.1191667 | 505 | 392 |
| Sluda | city | Kostromskaya Oblast' | Russia | 58.8666667 | 43.1666667 | 492 | 350 |
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