| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Obnize | city | Poland | 52.50 | 22.60 | 492 | 2707 | |
| Obrubniki | city | Poland | 53.23 | 23.02 | 613 | 1633 | |
| Ochremowicze | city | Poland | 53.00 | 23.40 | 577 | 180 | |
| Ochromowiec | city | Poland | 53.00 | 23.40 | 577 | 180 | |
| Ochrymy | city | Poland | 52.87 | 23.68 | 511 | 1076 | |
| Odnoga | city | Poland | 52.97 | 23.68 | 472 | 1434 | |
| Odnoga Denisowo | city | Poland | 52.97 | 23.68 | 472 | 1434 | |
| Odnoga Kuźmy | city | Poland | 52.97 | 23.68 | 472 | 1434 | |
| Odnoga Sacharki | city | Poland | 52.97 | 23.70 | 488 | 1416 | |
| Odnoga Saki | city | Poland | 52.97 | 23.68 | 472 | 1434 | |
| Odrynki | city | Poland | 52.95 | 23.60 | 459 | 1489 | |
| Ogrodniczki | city | Poland | 53.20 | 23.27 | 495 | 7126 | |
| Ogrodniki | city | Poland | 52.78 | 23.30 | 495 | 896 | |
| Ogrodniki | city | Poland | 53.20 | 23.05 | 534 | 18358 | |
| Ogrodniki | city | Poland | 52.97 | 23.52 | 452 | 1464 | |
| Ogrodniki | city | Poland | 53.55 | 23.50 | 528 | 1869 | |
| Ogrodniki | city | Poland | 52.38 | 22.80 | 423 | 5592 | |
| Ogrodniki | city | Poland | 53.12 | 23.02 | 511 | 13626 | |
| Okolica Nietupa | city | Poland | 53.18 | 23.73 | 515 | 1549 | |
| Oksiutycze | city | Poland | 52.42 | 22.98 | 547 | 2051 | |
| Olchówka | city | Poland | 52.85 | 23.83 | 505 | 1045 | |
| Oledzkie | city | Poland | 52.80 | 22.88 | 597 | 3279 | |
| Oleksin | city | Poland | 52.70 | 22.90 | 475 | 2651 | |
| Olendry | city | Poland | 52.38 | 22.93 | 413 | 4731 | |
| Olendzie | city | Poland | 52.80 | 22.88 | 597 | 3279 | |
| Oleszkowo | city | Poland | 53.33 | 23.18 | 577 | 4261 | |
| Oliszki | city | Poland | 53.13 | 23.05 | 495 | 63287 | |
| Olmonty | city | Poland | 53.10 | 23.17 | 564 | 159376 | |
| Olmony | city | Poland | 53.10 | 23.17 | 564 | 159376 | |
| Olsza | city | Poland | 53.67 | 23.23 | 567 | 3545 | |
| Olszanica | city | Poland | 52.87 | 23.08 | 459 | 1531 | |
| Olszanka | city | Poland | 52.98 | 23.40 | 561 | 462 | |
| Olszanka | city | Poland | 53.55 | 23.22 | 646 | 2374 | |
| Olszewo | city | Poland | 52.68 | 23.03 | 508 | 1542 | |
| Olszewo | city | Poland | 52.82 | 22.90 | 505 | 2169 | |
| Olędy | city | Poland | 52.70 | 22.77 | 475 | 2504 | |
| Opaka Duża | city | Poland | 52.53 | 23.45 | 629 | 2178 | |
| Opaka Wielka | city | Poland | 52.55 | 23.47 | 590 | 1952 | |
| Ordynki | city | Poland | 52.95 | 23.60 | 459 | 1489 | |
| Orla | city | Poland | 52.70 | 23.33 | 547 | 1609 | |
| Orlowicze | city | Poland | 53.43 | 23.58 | 547 | 5896 | |
| Orzechowice | city | Poland | 52.82 | 23.15 | 488 | 9151 | |
| Orzechowicze | city | Poland | 52.82 | 23.15 | 488 | 9151 | |
| Orzeszkowo | city | Poland | 52.68 | 23.55 | 544 | 8181 | |
| Orłowicze | city | Poland | 53.43 | 23.58 | 547 | 5896 | |
| Oslowo | city | Poland | 52.35 | 23.00 | 544 | 1472 | |
| Osmola | city | Poland | 52.57 | 22.97 | 528 | 1940 | |
| Osowka | city | Poland | 52.78 | 23.47 | 567 | 1113 | |
| Osowka | city | Poland | 52.88 | 22.92 | 495 | 2343 | |
| Osse | city | Poland | 52.98 | 22.83 | 406 | 11484 | |
| Ossolin | city | Poland | 52.47 | 22.95 | 587 | 2348 | |
| Ostra Góra | city | Poland | 53.40 | 23.17 | 662 | 2552 | |
| Ostrow | city | Poland | 53.72 | 23.28 | 423 | 2517 | |
| Ostrow Polnocny | city | Poland | 53.27 | 23.68 | 610 | 1164 | |
| Ostrow Poludniowy | city | Poland | 53.25 | 23.70 | 629 | 1426 | |
| Ostrowo | city | Poland | 53.68 | 23.40 | 436 | 3320 | |
| Ostrozany | city | Poland | 52.52 | 22.65 | 521 | 2543 | |
| Ostrynka | city | Poland | 53.42 | 23.28 | 629 | 1957 | |
| Ostrów Nowy | city | Poland | 53.25 | 23.67 | 567 | 1222 | |
| Ostrów Południowy | city | Poland | 53.25 | 23.70 | 629 | 1426 | |
| Ostrów Północny | city | Poland | 53.27 | 23.68 | 610 | 1164 | |
| Ostrówek | city | Poland | 53.28 | 23.70 | 567 | 1235 | |
| Ostrówek | city | Poland | 53.63 | 23.12 | 449 | 2317 | |
| Ostrówki | city | Poland | 52.97 | 23.33 | 508 | 29 | |
| Osłowo | city | Poland | 52.35 | 23.00 | 544 | 1472 | |
| Oziably | city | Poland | 53.03 | 23.67 | 505 | 1376 | |
| Oziabły | city | Poland | 53.03 | 23.67 | 505 | 1376 | |
| Ozierany Male | city | Poland | 53.22 | 23.87 | 479 | 2073 | |
| Ozierany Małe | city | Poland | 53.22 | 23.87 | 479 | 2073 | |
| Ozierany Wielki | city | Poland | 53.22 | 23.87 | 479 | 2073 | |
| Ozierskie | city | Poland | 53.25 | 23.72 | 610 | 1522 |