UpAlphabetical listing of Places in None
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Okolowice | city | | Poland | 51.73 | 19.33 | 531 | 75706 |
| Okołowice | city | | Poland | 51.73 | 19.33 | 531 | 75706 |
| Olechow Maly | city | | Poland | 51.73 | 19.55 | 698 | 179790 |
| Olechów | city | | Poland | 51.75 | 19.57 | 725 | 205821 |
| Olechów Duży | city | | Poland | 51.75 | 19.57 | 725 | 205821 |
| Olechów Mały | city | | Poland | 51.73 | 19.55 | 698 | 179790 |
| Opole | city | | Poland | 52.00 | 19.18 | 351 | 13192 |
| Orla | city | | Poland | 51.92 | 19.30 | 508 | 20271 |
| Osiny | city | | Poland | 51.95 | 19.72 | 439 | 18901 |
| Osse | city | | Poland | 51.93 | 19.57 | 515 | 5130 |
| Ostroleka | city | | Poland | 51.97 | 19.80 | 475 | 5633 |
| Ostroleka Malszyce | city | | Poland | 51.97 | 19.78 | 482 | 11055 |
| Ostrow | city | | Poland | 52.00 | 19.28 | 324 | 19308 |
| Ostrołęka | city | | Poland | 51.97 | 19.80 | 475 | 5633 |
| Ostrołęka Małszyce | city | | Poland | 51.97 | 19.78 | 482 | 11055 |
| Ozorkov | city | | Poland | 51.97 | 19.28 | 393 | 26290 |
| Ozorkow | city | | Poland | 51.97 | 19.28 | 393 | 26290 |
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