| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Ichinosawa | city | Sakhalinskaya Oblast' | Russia | 46.6708333 | 142.7541667 | 137 | 2188 |
| Igyd | city | Sakhalinskaya Oblast' | Russia | 54.2333333 | 142.3833333 | 118 | 61 |
| Ikedzuki-Khama | city | Sakhalinskaya Oblast' | Russia | 46.55 | 142.3833333 | 26 | 822 |
| Iketsukihama | city | Sakhalinskaya Oblast' | Russia | 46.55 | 142.3833333 | 26 | 822 |
| Ikusagawa | city | Sakhalinskaya Oblast' | Russia | 46.9919444 | 142.6719444 | 144 | 5515 |
| Ikusakawa | city | Sakhalinskaya Oblast' | Russia | 46.9919444 | 142.6719444 | 144 | 5515 |
| Il'insk | city | Sakhalinskaya Oblast' | Russia | 47.9977778 | 142.2091667 | 269 | 359 |
| Il'inskiy | city | Sakhalinskaya Oblast' | Russia | 47.9977778 | 142.2091667 | 269 | 359 |
| Imeni Kalinina | city | Sakhalinskaya Oblast' | Russia | 46.8916667 | 141.9836111 | 610 | 380 |
| Inso | city | Sakhalinskaya Oblast' | Russia | 48.0333333 | 142.6333333 | 0 | 0 |
| Inubo | city | Sakhalinskaya Oblast' | Russia | 46.2 | 142.25 | 0 | 357 |
| Inuboe | city | Sakhalinskaya Oblast' | Russia | 46.2 | 142.25 | 0 | 357 |
| InubÅ | city | Sakhalinskaya Oblast' | Russia | 46.2 | 142.25 | 0 | 357 |
| Iridomari | city | Sakhalinskaya Oblast' | Russia | 49.15 | 142.05 | 203 | 350 |
| Iritomari | city | Sakhalinskaya Oblast' | Russia | 49.15 | 142.05 | 203 | 350 |
| Irkir | city | Sakhalinskaya Oblast' | Russia | 51.2333333 | 142.6833333 | 167 | 336 |
| Isara | city | Sakhalinskaya Oblast' | Russia | 48.7166667 | 141.8833333 | 442 | 450 |
| Iti-no-Sawa | city | Sakhalinskaya Oblast' | Russia | 46.6708333 | 142.7541667 | 137 | 2188 |
| Itonai | city | Sakhalinskaya Oblast' | Russia | 49.2166667 | 142.1 | 108 | 410 |
| Itone | city | Sakhalinskaya Oblast' | Russia | 49.2166667 | 142.1 | 108 | 410 |
| Itsiyaranay | city | Sakhalinskaya Oblast' | Russia | 48.7166667 | 141.8833333 | 442 | 450 |
| Ivanoskaya | city | Sakhalinskaya Oblast' | Russia | 46.4 | 141.8666667 | 377 | 317 |
| Iwanousukoe | city | Sakhalinskaya Oblast' | Russia | 47.2333333 | 142.7 | 62 | 3043 |
| Izemermet'yevo | city | Sakhalinskaya Oblast' | Russia | 48.95 | 142 | 111 | 419 |
| Izmermet'yevo | city | Sakhalinskaya Oblast' | Russia | 48.95 | 142 | 111 | 419 |
| Izobil'naya | city | Sakhalinskaya Oblast' | Russia | 48.9166667 | 142.2166667 | 167 | 540 |
| Izopilnaya | city | Sakhalinskaya Oblast' | Russia | 48.9166667 | 142.2166667 | 167 | 540 |
| Izruchnoye | city | Sakhalinskaya Oblast' | Russia | 47.0166667 | 142.0333333 | 157 | 15657 |
| Izvestkovaya | city | Sakhalinskaya Oblast' | Russia | 50.55 | 142.6166667 | 1338 | 341 |
| Izvestkovyy | city | Sakhalinskaya Oblast' | Russia | 49.95 | 143.3666667 | 1509 | 229 |
| Izyl'met'yevo | city | Sakhalinskaya Oblast' | Russia | 48.95 | 142 | 111 | 419 |
| Izyndayevo | city | Sakhalinskaya Oblast' | Russia | 55.7333333 | 89.2 | 793 | 320 |
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