| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obedovo | city | Ivanovskaya Oblast' | Russia | 57.1344444 | 40.3341667 | 492 | 2198 |
| Oberneshino | city | Ivanovskaya Oblast' | Russia | 57.2166667 | 41.3833333 | 383 | 4587 |
| Oblikha | city | Ivanovskaya Oblast' | Russia | 57.15 | 41.8333333 | 492 | 3178 |
| Obronikha | city | Ivanovskaya Oblast' | Russia | 57.2 | 41.2333333 | 423 | 1192 |
| Obzherikha | city | Ivanovskaya Oblast' | Russia | 57.1816667 | 42.9577778 | 331 | 2307 |
| Obzhorikha | city | Ivanovskaya Oblast' | Russia | 57.1816667 | 42.9577778 | 331 | 2307 |
| Oferkovo | city | Ivanovskaya Oblast' | Russia | 57.15 | 41.6333333 | 433 | 3539 |
| Ofery | city | Ivanovskaya Oblast' | Russia | 57.2333333 | 42.3833333 | 492 | 1562 |
| Okeyevskoye | city | Ivanovskaya Oblast' | Russia | 57.2833333 | 40.8 | 364 | 1010 |
| Oktyabr'skiy | city | Ivanovskaya Oblast' | Russia | 57.1344444 | 40.3341667 | 492 | 2198 |
| Okulovo | city | Ivanovskaya Oblast' | Russia | 57.1833333 | 40.3666667 | 456 | 2192 |
| Okulovo | city | Ivanovskaya Oblast' | Russia | 57.1413889 | 42.1297222 | 465 | 1988 |
| Oltukhova | city | Ivanovskaya Oblast' | Russia | 57.3661111 | 41.6697222 | 439 | 1990 |
| Oltukhovo | city | Ivanovskaya Oblast' | Russia | 57.3661111 | 41.6697222 | 439 | 1990 |
| Olyukovo | city | Ivanovskaya Oblast' | Russia | 57.1777778 | 41.2230556 | 479 | 1192 |
| Ordenikha | city | Ivanovskaya Oblast' | Russia | 56.6 | 41.6166667 | 314 | 1356 |
| Orefino | city | Ivanovskaya Oblast' | Russia | 56.7833333 | 41.1333333 | 364 | 2179 |
| Orekhovo | city | Ivanovskaya Oblast' | Russia | 57.0755556 | 41.9386111 | 465 | 3320 |
| Orlovo | city | Ivanovskaya Oblast' | Russia | 56.7833333 | 41.45 | 311 | 4734 |
| Osanovets | city | Ivanovskaya Oblast' | Russia | 56.5666667 | 39.9833333 | 433 | 2001 |
| Osanovo | city | Ivanovskaya Oblast' | Russia | 57.7158333 | 41.6155556 | 564 | 940 |
| Oshurikha | city | Ivanovskaya Oblast' | Russia | 57.05 | 41.3166667 | 387 | 3555 |
| Osinovka | city | Ivanovskaya Oblast' | Russia | 57.3166667 | 40.7666667 | 482 | 1038 |
| Osinovka | city | Ivanovskaya Oblast' | Russia | 57.2680556 | 41.6513889 | 521 | 2333 |
| Osipenko | city | Ivanovskaya Oblast' | Russia | 57.3166667 | 41.8333333 | 410 | 1978 |
| Osokovo | city | Ivanovskaya Oblast' | Russia | 56.9666667 | 42.5333333 | 380 | 873 |
| Ostapovo | city | Ivanovskaya Oblast' | Russia | 56.65 | 42.15 | 364 | 1744 |
| Ostashevo | city | Ivanovskaya Oblast' | Russia | 57.3791667 | 42.1091667 | 423 | 85676 |
| Ostretsovo | city | Ivanovskaya Oblast' | Russia | 57.2 | 41.5666667 | 370 | 3536 |
| Ostrov | city | Ivanovskaya Oblast' | Russia | 57.1 | 40.3666667 | 492 | 2199 |
| Ostrov | city | Ivanovskaya Oblast' | Russia | 57.4166667 | 41.5166667 | 472 | 3863 |
| Osvetino | city | Ivanovskaya Oblast' | Russia | 57.08 | 39.9883333 | 452 | 826 |
| Otradnoye | city | Ivanovskaya Oblast' | Russia | 57.3833333 | 41.8166667 | 429 | 1773 |
| Ovechkino | city | Ivanovskaya Oblast' | Russia | 57.2666667 | 41.6333333 | 492 | 2333 |
| Overina | city | Ivanovskaya Oblast' | Russia | 57.6158333 | 41.8527778 | 482 | 2467 |
| Ovintsy | city | Ivanovskaya Oblast' | Russia | 57.05 | 41.9833333 | 442 | 3078 |
| Ovsyaniki | city | Ivanovskaya Oblast' | Russia | 57.2333333 | 40.45 | 551 | 2105 |
| Ovsyanitsy | city | Ivanovskaya Oblast' | Russia | 56.7833333 | 41.65 | 298 | 1644 |
| Ovsyannitsa | city | Ivanovskaya Oblast' | Russia | 56.7833333 | 41.65 | 298 | 1644 |
| Ozernyy | city | Ivanovskaya Oblast' | Russia | 57.1666667 | 40.9833333 | 410 | 2226 |
| Ozërnyy | city | Ivanovskaya Oblast' | Russia | 57.1666667 | 40.9833333 | 410 | 2226 |
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