| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Υάμεια | city | Peloponnisos | Greece | 36.80 | 21.87 | 1669 | 2791 |
| Υδρέα | city | Kentriki Makedonia | Greece | 40.96 | 22.08 | 324 | 10153 |
| Υδραία | city | Kentriki Makedonia | Greece | 40.96 | 22.08 | 324 | 10153 |
| Υδρούσσα | city | Dytiki Makedonia | Greece | 40.72 | 21.46 | 2509 | 3843 |
| Υλίκη | city | Sterea Ellada | Greece | 38.43 | 23.30 | 406 | 1042 |
| Υμηττός | city | Attiki | Greece | 37.95 | 23.75 | 416 | 1231079 |
| Υμηττός Αττικής | city | Attiki | Greece | 37.95 | 23.75 | 416 | 1231079 |
| Υπάτη | city | Sterea Ellada | Greece | 38.87 | 22.24 | 1669 | 1805 |
| Υπέρεια | city | Thessalia | Greece | 39.39 | 22.27 | 830 | 2019 |
| Υστέρνια | city | Notio Aigaio | Greece | 37.62 | 25.05 | 830 | 479 |
| Υφαντές | city | Anatoliki Makedonia kai Thraki | Greece | 41.12 | 25.36 | 72 | 14994 |
| Υφανταί | city | Anatoliki Makedonia kai Thraki | Greece | 41.12 | 25.36 | 72 | 14994 |
| Υψηλά Αλώνια | city | Peloponnisos | Greece | 38.08 | 22.61 | 255 | 6228 |
| Υψηλάντης | city | Sterea Ellada | Greece | 38.37 | 23.01 | 830 | 1578 |
| Υψηλομέτωπο | city | Voreio Aigaio | Greece | 39.32 | 26.24 | 1099 | 3048 |
| Υψηλό | city | Anatoliki Makedonia kai Thraki | Greece | 41.11 | 24.30 | 830 | 5349 |
| Υψηλό | city | Dytiki Makedonia | Greece | 40.44 | 21.16 | 2509 | 3089 |
| Υψηλό | city | Dytiki Ellada | Greece | 37.64 | 21.75 | 1049 | 3132 |
| Υψηλόκαστρο | city | Anatoliki Makedonia kai Thraki | Greece | 41.19 | 24.32 | 830 | 818 |
| Υψηλόκαστρον | city | Anatoliki Makedonia kai Thraki | Greece | 41.19 | 24.32 | 830 | 818 |
| Υψηλόν | city | Dytiki Makedonia | Greece | 40.44 | 21.16 | 2509 | 3089 |
| Υψηλόν | city | Dytiki Ellada | Greece | 37.64 | 21.75 | 1049 | 3132 |
| Υψούς | city | Peloponnisos | Greece | 37.56 | 22.08 | 3484 | 639 |