| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Costrena Santa Lucia | city | Primorsko-Goranska Zupanija | Croatia | 45.30 | 14.51 | 830 | 3861 |
| Costrignano | city | Emilia-Romagna | Italy | 44.37 | 10.67 | 2641 | 3785 |
| Costrijeni | city | Chernivets'ka Oblast' | Ukraine | 48.65 | 25.71 | 830 | 7266 |
| Costroma | city | Kostromskaya Oblast' | Russia | 57.77 | 40.93 | 334 | 141610 |