| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Ydra | city | Nomos Attikis | Greece | 37.3477778 | 23.4588889 | 3 | 29828 |
| Ydraia | city | Nomos Pellis | Greece | 40.9594444 | 22.0813889 | 324 | 6231 |
| Ydraía | city | Nomos Pellis | Greece | 40.9594444 | 22.0813889 | 324 | 6231 |
| Ydroussa | city | Nomos Samou | Greece | 37.7794444 | 26.7516667 | 1332 | 5481 |
| Ydroússa | city | Nomos Samou | Greece | 37.7794444 | 26.7516667 | 1332 | 5481 |
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