| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Ogulpasa | city | Bilecik Ili | Turkey | 40.4666667 | 29.8666667 | 2601 | 11830 |
| Oklubali | city | Bilecik Ili | Turkey | 39.8175 | 30.2527778 | 2847 | 5117 |
| Oklubalı | city | Bilecik Ili | Turkey | 39.8175 | 30.2527778 | 2847 | 5117 |
| Okluca | city | Bilecik Ili | Turkey | 40.2333333 | 29.85 | 1604 | 5061 |
| Oluklu | city | Bilecik Ili | Turkey | 39.9136111 | 30.2077778 | 3333 | 4067 |
| Orhaniye | city | Bilecik Ili | Turkey | 40.35 | 29.9 | 1217 | 4103 |
| Ormanguzle | city | Bilecik Ili | Turkey | 39.8833333 | 29.9166667 | 3267 | 4060 |
| Ormangüzle | city | Bilecik Ili | Turkey | 39.8833333 | 29.9166667 | 3267 | 4060 |
| Ortaca | city | Bilecik Ili | Turkey | 39.9622222 | 30.3336111 | 3956 | 4187 |
| Osmaneli | city | Bilecik Ili | Turkey | 40.3572222 | 30.0141667 | 564 | 4234 |
| Osmaniye | city | Bilecik Ili | Turkey | 39.6686111 | 30.033333 | 3395 | 4088 |
| Oğulpaşa | city | Bilecik Ili | Turkey | 40.4666667 | 29.8666667 | 2601 | 11830 |
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