| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Obidowek | city | Poland | 52.15 | 19.37 | 305 | 7104 | |
| Obreb Maly | city | Poland | 52.73 | 19.52 | 324 | 3636 | |
| Obreb Wielki | city | Poland | 52.73 | 19.53 | 311 | 3631 | |
| Obręb | city | Poland | 52.73 | 19.53 | 311 | 3631 | |
| Obręb Mały | city | Poland | 52.73 | 19.52 | 324 | 3636 | |
| Odolin | city | Poland | 52.17 | 19.62 | 318 | 4825 | |
| Ogrodzona | city | Poland | 52.20 | 19.17 | 367 | 6291 | |
| Okolusz | city | Poland | 52.42 | 19.78 | 272 | 83 | |
| Olszynowo | city | Poland | 52.45 | 20.17 | 351 | 4986 | |
| Olszyny | city | Poland | 52.27 | 19.95 | 318 | 3876 | |
| Opatówiec | city | Poland | 52.62 | 19.95 | 439 | 4582 | |
| Oporów | city | Poland | 52.25 | 19.57 | 295 | 6266 | |
| Oraczew | city | Poland | 52.13 | 19.25 | 351 | 4776 | |
| Oradki | city | Poland | 52.10 | 19.50 | 301 | 3152 | |
| Oratki | city | Poland | 52.25 | 19.70 | 272 | 9819 | |
| Orenice | city | Poland | 52.08 | 19.52 | 295 | 3689 | |
| Orenice Nowe | city | Poland | 52.08 | 19.52 | 295 | 3689 | |
| Orenice Stare | city | Poland | 52.08 | 19.53 | 305 | 3660 | |
| Orlow | city | Poland | 52.13 | 19.57 | 282 | 3639 | |
| Orszewice | city | Poland | 52.08 | 19.32 | 324 | 4309 | |
| Orszymowo | city | Poland | 52.45 | 20.17 | 351 | 4986 | |
| Orłów | city | Poland | 52.13 | 19.57 | 282 | 3639 | |
| Osiek | city | Poland | 52.82 | 19.95 | 374 | 2993 | |
| Osiek Pasieczny | city | Poland | 52.80 | 19.93 | 367 | 3166 | |
| Osiek Piaseczny | city | Poland | 52.80 | 19.93 | 367 | 3166 | |
| Osiek Wielki | city | Poland | 52.82 | 19.93 | 377 | 2986 | |
| Osiek Wlostybory | city | Poland | 52.82 | 19.95 | 374 | 2993 | |
| Osiek Wlotybory | city | Poland | 52.82 | 19.95 | 374 | 2993 | |
| Osiek Włostybory | city | Poland | 52.82 | 19.95 | 374 | 2993 | |
| Osiek Włotybory | city | Poland | 52.82 | 19.95 | 374 | 2993 | |
| Osiny | city | Poland | 52.35 | 19.38 | 331 | 3015 | |
| Osiny | city | Poland | 52.25 | 19.92 | 314 | 3487 | |
| Osiny Ruszkow | city | Poland | 52.35 | 19.38 | 331 | 3015 | |
| Osmalin | city | Poland | 52.30 | 19.83 | 314 | 5041 | |
| Osmolin | city | Poland | 52.30 | 19.83 | 314 | 5041 | |
| Osowia | city | Poland | 52.37 | 19.53 | 301 | 7284 | |
| Osowka | city | Poland | 52.88 | 19.57 | 377 | 3607 | |
| Ostrowy | city | Poland | 52.78 | 19.65 | 400 | 4573 | |
| Ostrowy | city | Poland | 52.78 | 19.87 | 370 | 3258 | |
| Ostrowy | city | Poland | 52.30 | 19.17 | 360 | 5065 | |
| Ostrzykowo | city | Poland | 52.60 | 20.02 | 479 | 4352 | |
| Ostrówki | city | Poland | 52.30 | 19.13 | 383 | 4884 | |
| Osędowice | city | Poland | 52.17 | 19.22 | 360 | 5310 | |
| Ośnica | city | Poland | 52.52 | 19.77 | 183 | 38786 |