| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Obara | city | Kanagawa-ken | Japan | 35.6166667 | 139.2 | 862 | 464926 |
| Obusa | city | Kanagawa-ken | Japan | 35.6013889 | 139.2005556 | 862 | 464926 |
| Ochiai | city | Kanagawa-ken | Japan | 35.4166667 | 139.05 | 984 | 401164 |
| Oda-Sakaecho | city | Kanagawa-ken | Japan | 35.5166667 | 139.7 | 26 | 417416 |
| Oda-Sakaechō | city | Kanagawa-ken | Japan | 35.5166667 | 139.7 | 26 | 417416 |
| Odawara | city | Kanagawa-ken | Japan | 35.2555556 | 139.1597222 | 45 | 368295 |
| Ofuna | city | Kanagawa-ken | Japan | 35.3502778 | 139.5263889 | 65 | 387518 |
| Ogicho | city | Kanagawa-ken | Japan | 35.5 | 139.7333333 | 0 | 173637 |
| Ogimachi | city | Kanagawa-ken | Japan | 35.5 | 139.7333333 | 0 | 173637 |
| Ohara | city | Kanagawa-ken | Japan | 35.6166667 | 139.2 | 862 | 464926 |
| Oiso | city | Kanagawa-ken | Japan | 35.3030556 | 139.3027778 | 0 | 260611 |
| Oiso-machi | city | Kanagawa-ken | Japan | 35.3030556 | 139.3027778 | 0 | 260611 |
| Okawacho | city | Kanagawa-ken | Japan | 35.4833333 | 139.7166667 | 3 | 173637 |
| Okawamachi | city | Kanagawa-ken | Japan | 35.4833333 | 139.7166667 | 3 | 173637 |
| Okawara | city | Kanagawa-ken | Japan | 35.5402778 | 139.1202778 | 1312 | 261387 |
| Okubo | city | Kanagawa-ken | Japan | 35.3194444 | 139.2202778 | 239 | 348358 |
| Omote-takashimacho | city | Kanagawa-ken | Japan | 35.4666667 | 139.6333333 | 3 | 350582 |
| Omote-takashimachō | city | Kanagawa-ken | Japan | 35.4666667 | 139.6333333 | 3 | 350582 |
| Onocho | city | Kanagawa-ken | Japan | 35.4666667 | 139.6333333 | 3 | 350582 |
| Onomachi | city | Kanagawa-ken | Japan | 35.4666667 | 139.6333333 | 3 | 350582 |
| Onsenso | city | Kanagawa-ken | Japan | 35.2386111 | 139.0372222 | 2952 | 333856 |
| Onsensō | city | Kanagawa-ken | Japan | 35.2386111 | 139.0372222 | 2952 | 333856 |
| Oppama | city | Kanagawa-ken | Japan | 35.3094444 | 139.6255556 | 72 | 270908 |
| Oppamacho | city | Kanagawa-ken | Japan | 35.3094444 | 139.6255556 | 72 | 270908 |
| Oppamachō | city | Kanagawa-ken | Japan | 35.3094444 | 139.6255556 | 72 | 270908 |
| Oshimacho | city | Kanagawa-ken | Japan | 35.5166667 | 139.7333333 | 0 | 392658 |
| Oshimachō | city | Kanagawa-ken | Japan | 35.5166667 | 139.7333333 | 0 | 392658 |
| Ozuku | city | Kanagawa-ken | Japan | 35.5852778 | 139.1341667 | 1266 | 303351 |
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