| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Isaakio | city | Anatoliki Makedonia kai Thraki | Greece | 41.36 | 26.54 | 118 | 73551 |
| Isakerlíon | city | Thessalia | Greece | 39.23 | 22.51 | 1174 | 1017 |
| Isakio | city | Anatoliki Makedonia kai Thraki | Greece | 41.36 | 26.54 | 118 | 73551 |
| Isaklar | city | Dytiki Makedonia | Greece | 40.38 | 21.99 | 2509 | 2056 |
| Isalo | city | Anatoliki Makedonia kai Thraki | Greece | 41.06 | 25.45 | 95 | 12729 |
| Isari | city | Thessalia | Greece | 39.38 | 21.86 | 387 | 22220 |
| Isaris | city | Peloponnisos | Greece | 37.36 | 22.01 | 2509 | 1817 |
| Isarlik | city | Thessalia | Greece | 39.50 | 22.45 | 830 | 2077 |
| Isaákion | city | Anatoliki Makedonia kai Thraki | Greece | 41.36 | 26.54 | 118 | 73551 |
| Isia | city | Voreio Aigaio | Greece | 38.30 | 26.06 | 1204 | 6057 |
| Isiklar | city | Anatoliki Makedonia kai Thraki | Greece | 41.08 | 25.76 | 830 | 1972 |
| Isirli | city | Anatoliki Makedonia kai Thraki | Greece | 40.85 | 24.06 | 830 | 1642 |
| Isiómata | city | Thessalia | Greece | 39.44 | 21.48 | 3349 | 1940 |
| Iskupler | city | Dytiki Makedonia | Greece | 40.36 | 21.93 | 2509 | 3984 |
| Islamli | city | Dytiki Makedonia | Greece | 40.33 | 21.79 | 2509 | 14097 |
| Ismaḯl | city | Peloponnisos | Greece | 37.02 | 21.95 | 203 | 5952 |
| Isna | city | Peloponnisos | Greece | 36.83 | 22.32 | 830 | 1745 |
| Isoma | city | Dytiki Ellada | Greece | 38.10 | 21.69 | 387 | 5437 |
| Isomata | city | Thessalia | Greece | 39.18 | 23.91 | 830 | 1710 |
| Isomata | city | Peloponnisos | Greece | 37.39 | 22.64 | 1112 | 1192 |
| Isonídhion | city | Peloponnisos | Greece | 37.17 | 22.86 | 95 | 3862 |
| Isonídion | city | Peloponnisos | Greece | 37.17 | 22.86 | 95 | 3862 |
| Issakion | city | Anatoliki Makedonia kai Thraki | Greece | 41.36 | 26.54 | 118 | 73551 |
| Isthmia | city | Peloponnisos | Greece | 37.92 | 23.01 | 3 | 13229 |
| Isthmos | city | Peloponnisos | Greece | 37.92 | 23.01 | 3 | 13229 |
| Istiaia | city | Sterea Ellada | Greece | 38.95 | 23.15 | 154 | 7003 |
| Istiea | city | Sterea Ellada | Greece | 38.95 | 23.15 | 154 | 7003 |
| Istrane | city | Anatoliki Makedonia kai Thraki | Greece | 41.37 | 24.10 | 1669 | 967 |
| Istrio | city | Notio Aigaio | Greece | 36.10 | 27.83 | 1669 | 492 |
| Istrios | city | Notio Aigaio | Greece | 36.10 | 27.83 | 1669 | 492 |
| Istron | city | Kriti | Greece | 35.12 | 25.74 | 1082 | 4350 |
| Istérnia | city | Notio Aigaio | Greece | 37.62 | 25.05 | 830 | 479 |
| Isvor | city | Kentriki Makedonia | Greece | 41.01 | 22.50 | 830 | 2266 |
| Isvoros | city | Dytiki Makedonia | Greece | 40.27 | 21.78 | 1978 | 15083 |
| Isá Óbasi | city | Kentriki Makedonia | Greece | 40.58 | 23.42 | 830 | 1954 |
| Isómata | city | Thessalia | Greece | 39.36 | 21.53 | 3589 | 1232 |
| Isómata | city | Sterea Ellada | Greece | 38.88 | 21.65 | 2933 | 900 |
| Isómata | city | Sterea Ellada | Greece | 38.78 | 21.62 | 3349 | 509 |