| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ιάμπολη | city | Anatoliki Makedonia kai Thraki | Greece | 41.16 | 25.49 | 830 | 13178 |
| Ιάσιο | city | Anatoliki Makedonia kai Thraki | Greece | 41.07 | 25.71 | 216 | 4708 |
| Ιάσιον | city | Anatoliki Makedonia kai Thraki | Greece | 41.07 | 25.71 | 216 | 4708 |
| Ιέραξ | city | Peloponnisos | Greece | 36.81 | 23.06 | 912 | 587 |
| Ιαλυσού | city | Notio Aigaio | Greece | 36.41 | 28.17 | 78 | 44211 |
| Ιαλυσός | city | Notio Aigaio | Greece | 36.41 | 28.17 | 78 | 44211 |
| Ιγρίτα | city | Kentriki Makedonia | Greece | 40.91 | 23.50 | 390 | 8331 |
| Ιεράπετρα | city | Kriti | Greece | 35.01 | 25.74 | 0 | 6350 |
| Ιεράπυτνα | city | Kriti | Greece | 35.01 | 25.74 | 0 | 6350 |
| Ιερισσός | city | Kentriki Makedonia | Greece | 40.40 | 23.88 | 0 | 4346 |
| Ιερομνήμη | city | Ipeiros | Greece | 39.77 | 20.58 | 1669 | 1702 |
| Ιερομόναχος | city | Ionia Nisia | Greece | 39.20 | 20.18 | 830 | 1926 |
| Ιεροπηγή | city | Dytiki Makedonia | Greece | 40.58 | 21.08 | 3349 | 2078 |
| Ιθάκη | city | Ionia Nisia | Greece | 38.36 | 20.72 | 6 | 2155 |
| Ιντζέκ | city | Thessalia | Greece | 39.17 | 22.62 | 1669 | 880 |
| Ιουλίδα | city | Notio Aigaio | Greece | 37.63 | 24.35 | 1246 | 1244 |
| Ιπποκράτειος Πολιτεία | city | Attiki | Greece | 38.21 | 23.80 | 1669 | 14826 |
| Ισά Όμπαση | city | Kentriki Makedonia | Greece | 40.58 | 23.42 | 830 | 1954 |
| Ισαάκιο | city | Anatoliki Makedonia kai Thraki | Greece | 41.36 | 26.54 | 118 | 73551 |
| Ισαάκιον | city | Anatoliki Makedonia kai Thraki | Greece | 41.36 | 26.54 | 118 | 73551 |
| Ισθμία | city | Peloponnisos | Greece | 37.92 | 23.01 | 3 | 13229 |
| Ισιώματα | city | Thessalia | Greece | 39.44 | 21.48 | 3349 | 1940 |
| Ιστέρνια | city | Notio Aigaio | Greece | 37.62 | 25.05 | 830 | 479 |
| Ιστιαία | city | Sterea Ellada | Greece | 38.95 | 23.15 | 154 | 7003 |
| Ισώματα | city | Thessalia | Greece | 39.18 | 23.91 | 830 | 1710 |
| Ισώματα | city | Sterea Ellada | Greece | 38.88 | 21.65 | 2933 | 900 |
| Ισώματα | city | Sterea Ellada | Greece | 38.78 | 21.62 | 3349 | 509 |
| Ιτέα | city | Sterea Ellada | Greece | 39.13 | 21.45 | 3349 | 1111 |
| Ιτέα | city | Anatoliki Makedonia kai Thraki | Greece | 40.97 | 26.19 | 196 | 2051 |
| Ιτέα | city | Dytiki Makedonia | Greece | 40.84 | 21.51 | 1978 | 2594 |
| Ιτέα | city | Dytiki Makedonia | Greece | 40.06 | 21.62 | 2093 | 801 |
| Ιτέα | city | Thessalia | Greece | 39.86 | 22.52 | 131 | 2884 |
| Ιτέα | city | Ipeiros | Greece | 39.77 | 21.01 | 2788 | 912 |
| Ιτέα | city | Thessalia | Greece | 39.46 | 22.17 | 351 | 4046 |
| Ιτέα | city | Sterea Ellada | Greece | 38.43 | 22.42 | 0 | 7426 |
| Ιτιά | city | Ipeiros | Greece | 39.29 | 21.42 | 2509 | 1113 |
| Ιωάννινα | city | Ipeiros | Greece | 39.66 | 20.85 | 1669 | 72027 |
| Ιωνικό | city | Anatoliki Makedonia kai Thraki | Greece | 41.24 | 24.63 | 830 | 9 |
| Ιωνικόν | city | Anatoliki Makedonia kai Thraki | Greece | 41.24 | 24.63 | 830 | 9 |