| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ó Bars | city | Nitriansky | Slovakia | 48.24 | 18.54 | 830 | 13980 |
| Ó Méith | city | Lu | Ireland | 54.09 | -6.26 | 82 | 5601 |
| Ó-Gelle | city | Trnavsky | Slovakia | 47.99 | 17.48 | 403 | 6231 |
| Ó-Goa | city | Goa | India | 15.44 | 73.88 | 32 | 117177 |
| Ó-Gutapuszta | city | Nitriansky | Slovakia | 47.93 | 18.08 | 347 | 4170 |
| Ó-Ludadpuszta | city | Bekes | Hungary | 46.77 | 21.13 | 282 | 20220 |
| Ó-Szent-Ivány | city | Csongrad | Hungary | 46.17 | 20.16 | 252 | 16602 |
| Ó-hecske | city | Bacs-Kiskun | Hungary | 46.93 | 20.10 | 275 | 11010 |
| Ó-péterváradja | city | Novi Sad | Serbia | 45.26 | 19.83 | 285 | 41340 |
| Óalmás | city | Bacs-Kiskun | Hungary | 46.13 | 19.33 | 387 | 6988 |
| Óasi | city | Dytiki Ellada | Greece | 38.08 | 22.34 | 2063 | 2468 |
| Óasi | city | Kriti | Greece | 35.48 | 23.96 | 75 | 20557 |
| Óasis | city | Dytiki Ellada | Greece | 38.08 | 22.34 | 2063 | 2468 |
| Óbarokpuszta | city | Fejer | Hungary | 47.49 | 18.57 | 830 | 6891 |
| Óbars | city | Nitriansky | Slovakia | 48.24 | 18.54 | 830 | 13980 |
| Óberekpuszta | city | Tolna | Hungary | 46.25 | 18.72 | 262 | 4859 |
| Óbeszterce | city | Zilinsky | Slovakia | 49.35 | 18.95 | 1899 | 4868 |
| Óbidos Airport | airport | -1.87 | -55.51 | 328 | 0 | ||
| Óbingula | city | Serbia | 45.14 | 19.48 | 843 | 3872 | |
| Óbis | city | Hajdu-Bihar | Hungary | 47.02 | 21.50 | 311 | 3280 |
| Óborlovény | city | Caras-Severin | Romania | 44.96 | 22.11 | 1171 | 916 |
| Óborsa | city | Hunedoara | Romania | 46.13 | 22.43 | 1669 | 1363 |
| Óbuda | city | Budapest | Hungary | 47.55 | 19.03 | 278 | 328406 |
| Óbuda-Békásmegyer | city | Budapest | Hungary | 47.55 | 19.03 | 278 | 328406 |
| Óbudavár | city | Veszprem | Hungary | 46.94 | 17.69 | 1099 | 2618 |
| Óbánya | city | Baranya | Hungary | 46.22 | 18.41 | 974 | 5614 |
| Óbást | city | Banskobystricky | Slovakia | 48.18 | 19.94 | 856 | 4266 |
| Óbébiúti Tanyák | city | Csongrad | Hungary | 46.18 | 20.43 | 272 | 8057 |
| Óchthia | city | Dytiki Ellada | Greece | 38.66 | 21.28 | 127 | 5717 |
| Óchtos | city | Peloponnisos | Greece | 37.05 | 22.90 | 2582 | 688 |
| Ócsa | city | Hajdu-Bihar | Hungary | 47.53 | 21.90 | 830 | 6676 |
| Ócsad | city | Zilinsky | Slovakia | 49.44 | 18.88 | 1837 | 12735 |
| Ócuki | city | Yamanashi | Japan | 35.60 | 138.93 | 1669 | 23943 |
| Ócùa | city | Zambezia | Mozambique | -15.02 | 37.01 | 2509 | 2453 |
| Ódalmand | city | Tolna | Hungary | 46.50 | 18.18 | 830 | 3535 |
| Ódomari | city | Sakhalinskaya Oblast' | Russia | 46.63 | 142.78 | 29 | 1210 |
| Ódávidháza | city | Zakarpats'ka Oblast' | Ukraine | 48.46 | 22.63 | 374 | 38552 |
| Ódöbrönte | city | Veszprem | Hungary | 47.23 | 17.53 | 830 | 3666 |
| Ódörögdpuszta | city | Veszprem | Hungary | 46.95 | 17.41 | 830 | 6319 |
| Ófalui Part | city | Borsod-Abauj-Zemplen | Hungary | 48.15 | 20.98 | 830 | 8457 |
| Ófehértó | city | Szabolcs-Szatmar-Bereg | Hungary | 47.93 | 22.05 | 830 | 5612 |
| Ófeigsfjörður | city | Vestfirdhir | Iceland | 66.05 | -21.71 | 269 | 8 |
| Ófeigsstaðir | city | Nordhurland Eystra | Iceland | 65.84 | -17.54 | 59 | 17 |
| Ófelfalu | city | Banskobystricky | Slovakia | 48.68 | 18.91 | 1669 | 7781 |
| Ófelfalu | city | Nitriansky | Slovakia | 48.61 | 18.49 | 1000 | 4982 |
| Ófutak | city | Serbia | 45.25 | 19.76 | 295 | 41335 | |
| Ófutak | city | Serbia | 45.24 | 19.71 | 282 | 36822 | |
| Ófuttak | city | Serbia | 45.24 | 19.71 | 282 | 36822 | |
| Óföldeák | city | Csongrad | Hungary | 46.30 | 20.45 | 262 | 4478 |
| Óföldeákpuszta | city | Csongrad | Hungary | 46.30 | 20.45 | 262 | 4478 |
| Ógerlistye | city | Caras-Severin | Romania | 44.90 | 22.09 | 1207 | 1200 |
| Ógrác | city | Viroviticko-Podravska Zupanija | Croatia | 45.92 | 17.29 | 344 | 1720 |
| Ógyalla | city | Nitriansky | Slovakia | 47.88 | 18.20 | 830 | 10316 |
| Óhalász | city | Heves | Hungary | 47.58 | 20.68 | 269 | 1505 |
| Óhegy | city | Tolna | Hungary | 46.30 | 18.53 | 830 | 16507 |
| Óhegy | city | Pest | Hungary | 47.56 | 19.22 | 830 | 65055 |
| Óhid | city | Hajdu-Bihar | Hungary | 47.02 | 21.50 | 311 | 3280 |
| Óhodász | city | Burgenland | Austria | 47.32 | 16.38 | 1669 | 4750 |
| Ójankovác | city | Vukovarsko-Srijemska Zupanija | Croatia | 45.26 | 18.91 | 314 | 4622 |
| Ókemence | city | Zakarpats'ka Oblast' | Ukraine | 48.69 | 22.40 | 830 | 2669 |
| Ókeresztúr | city | Serbia | 46.13 | 20.09 | 242 | 3580 | |
| Ókeske | city | Bacs-Kiskun | Hungary | 46.93 | 20.10 | 275 | 11010 |
| Ókhthia | city | Peloponnisos | Greece | 37.66 | 21.90 | 2509 | 1525 |
| Ókigyós | city | Bekes | Hungary | 46.62 | 21.10 | 301 | 19155 |
| Ókécske | city | Bacs-Kiskun | Hungary | 46.93 | 20.10 | 275 | 11010 |
| Ókér | city | Serbia | 45.45 | 19.69 | 272 | 3874 | |
| Ókörmöcke | city | Banskobystricky | Slovakia | 48.61 | 18.89 | 1712 | 17512 |
| Ókörtvélyes | city | Burgenland | Austria | 47.00 | 16.20 | 830 | 5704 |
| Óladány | city | Csongrad | Hungary | 46.17 | 20.47 | 282 | 10831 |
| Ólafsdalur | city | Vesturland | Iceland | 65.42 | -21.74 | 318 | 0 |
| Ólafsfiði | city | Nordhurland Eystra | Iceland | 66.07 | -18.64 | 1738 | 614 |
| Ólafsfjarðar | city | Nordhurland Eystra | Iceland | 66.07 | -18.64 | 1738 | 614 |
| Ólafsfjörð | city | Nordhurland Eystra | Iceland | 66.07 | -18.64 | 1738 | 614 |
| Ólafsfjörður | city | Nordhurland Eystra | Iceland | 66.07 | -18.64 | 1738 | 614 |
| Ólafsfjörður Airport | airport | 66.08 | -18.67 | 32 | 0 | ||
| Ólafsgerði | city | Nordhurland Eystra | Iceland | 66.09 | -16.83 | 98 | 0 |
| Ólafsvellir | city | Sudhurland | Iceland | 64.01 | -20.60 | 170 | 72 |
| Ólafsvík | city | Vesturland | Iceland | 64.89 | -23.72 | 305 | 637 |
| Ólena | city | Dytiki Ellada | Greece | 37.74 | 21.56 | 334 | 5173 |
| Óleo | city | Sao Paulo | Brazil | -22.94 | -49.34 | 2034 | 3245 |
| Ólga | city | Dytiki Ellada | Greece | 37.90 | 21.35 | 75 | 6893 |
| Ólhos d’Água Sêco | city | Bahia | Brazil | -12.54 | -42.12 | 3349 | 596 |
| Ólinthos | city | Kentriki Makedonia | Greece | 40.28 | 23.35 | 0 | 6848 |
| Ólmod | city | Vas | Hungary | 47.42 | 16.59 | 830 | 10018 |
| Ólubló | city | Presovsky | Slovakia | 49.30 | 20.69 | 1761 | 22627 |
| Ólvölgy | city | Baranya | Hungary | 46.28 | 18.38 | 830 | 6548 |
| Ólympos | city | Attiki | Greece | 37.78 | 23.95 | 830 | 16054 |
| Ólympos | city | Notio Aigaio | Greece | 35.74 | 27.17 | 830 | 321 |
| Óléc | city | Serbia | 45.28 | 20.96 | 157 | 3874 | |
| Ólécz | city | Serbia | 45.28 | 20.96 | 157 | 3874 | |
| Ómalomsok | city | Veszprem | Hungary | 47.45 | 17.39 | 370 | 2619 |
| Ómassa | city | Miskolc | Hungary | 48.12 | 20.53 | 1847 | 3341 |
| Ómbar | city | Kentriki Makedonia | Greece | 40.84 | 22.30 | 75 | 2737 |
| Ómezőhegyes | city | Bekes | Hungary | 46.30 | 20.83 | 311 | 3331 |
| Ómikanovce | city | Vukovarsko-Srijemska Zupanija | Croatia | 45.28 | 18.54 | 252 | 3976 |
| Ómoldova | city | Caras-Severin | Romania | 44.73 | 21.62 | 239 | 10180 |
| Ónainn | city | Kilkenny | Ireland | 52.39 | -7.34 | 193 | 3269 |
| Ónfalva | city | Bacau | Romania | 46.25 | 26.75 | 830 | 40976 |
| Ónoditanya | city | Szabolcs-Szatmar-Bereg | Hungary | 47.98 | 21.33 | 328 | 9232 |
| Ónzel | city | Limburg | Netherlands | 50.91 | 5.81 | 410 | 59373 |
| Ónána | city | Tolna | Hungary | 46.47 | 18.49 | 830 | 2440 |
| Óoetanéno | city | Montana | United States | 45.60 | -107.46 | 3349 | |
| Ópaulis | city | Arad | Romania | 46.12 | 21.58 | 830 | 4801 |
| Ópiski | city | Hunedoara | Romania | 45.82 | 23.05 | 1184 | 3344 |
| Ópáva | city | Opovo | Serbia | 45.05 | 20.43 | 223 | 4950 |
| Ópázova | city | Stara Pazova | Serbia | 44.99 | 20.16 | 252 | 67130 |
| Ópécska | city | Arad | Romania | 46.17 | 21.07 | 331 | 6203 |
| Óracsa | city | Bjelovarsko-Bilogorska Zupanija | Croatia | 45.82 | 16.95 | 396 | 3115 |
| Óradna | city | Bistrita-Nasaud | Romania | 47.42 | 24.82 | 1975 | 8398 |
| Órcsha | city | Madhya Pradesh | India | 25.35 | 78.64 | 830 | 31023 |
| Órdenes | city | Galicia | Spain | 43.08 | -8.41 | 925 | 8887 |
| Órgano | city | Queretaro | Mexico | 20.87 | -100.47 | 6915 | 97591 |
| Órganos | city | Chihuahua | Mexico | 28.33 | -104.78 | 5242 | 0 |
| Órganos | city | Zacatecas | Mexico | 22.92 | -102.92 | 7549 | 2036 |
| Órganos | city | Oaxaca | Mexico | 16.55 | -94.57 | 295 | 745 |
| Órganos | city | Durango | Mexico | 22.96 | -104.44 | 6886 | 447 |
| Órgãos | city | Sao Lourenco dos Orgaos | Cape Verde | 15.07 | -23.62 | 1669 | 26504 |
| Órjiva | city | Andalucia | Spain | 36.90 | -3.42 | 1669 | 3295 |
| Órliakon | city | Kentriki Makedonia | Greece | 41.04 | 23.31 | 104 | 3854 |
| Órma | city | Kentriki Makedonia | Greece | 40.95 | 21.93 | 1046 | 2129 |
| Órmos | city | Voreio Aigaio | Greece | 37.80 | 26.71 | 328 | 7470 |
| Órmos Agíou Isidórou | city | Voreio Aigaio | Greece | 37.75 | 26.59 | 219 | 1265 |
| Órmos Koumaíïkon | city | Voreio Aigaio | Greece | 37.70 | 26.75 | 0 | 1854 |
| Órmos Marathokámpou | city | Voreio Aigaio | Greece | 37.71 | 26.70 | 0 | 3285 |
| Órmos Prínou | city | Anatoliki Makedonia kai Thraki | Greece | 40.76 | 24.58 | 19 | 1557 |
| Órmos Ágios Isídoros | city | Voreio Aigaio | Greece | 37.75 | 26.59 | 219 | 1265 |
| Órmos Épanomís | city | Kentriki Makedonia | Greece | 40.41 | 22.90 | 0 | 5476 |
| Óros | city | Kriti | Greece | 35.29 | 24.50 | 1669 | 17127 |
| Órovnik | city | Dytiki Makedonia | Greece | 40.76 | 21.15 | 3349 | 446 |
| Órrea | city | Galicia | Spain | 43.27 | -7.25 | 2076 | 2609 |
| Óruszolc | city | Caras-Severin | Romania | 44.98 | 21.51 | 351 | 2609 |
| Órán Mór | city | Galway | Ireland | 53.27 | -8.92 | 22 | 8611 |
| Ós | city | Nordhurland Vestra | Iceland | 65.35 | -20.90 | 229 | 277 |
| Ós | city | Nordhurland Vestra | Iceland | 66.03 | -20.42 | 72 | 0 |
| Ós | city | Vestfirdhir | Iceland | 65.73 | -23.36 | 72 | 0 |
| Ós | city | Vestfirdhir | Iceland | 65.73 | -21.69 | 6 | 288 |
| Ósar | city | Nordhurland Vestra | Iceland | 65.60 | -20.65 | 65 | 0 |
| Ósbrekka | city | Nordhurland Eystra | Iceland | 66.07 | -18.68 | 3 | 546 |
| Óscari | city | Sardegna | Italy | 40.72 | 9.10 | 830 | 1760 |
| Ósebeshely | city | Hunedoara | Romania | 45.75 | 23.25 | 1971 | 1694 |
| Óseyri | city | Austurland | Iceland | 64.84 | -13.96 | 3 | 111 |
| Ósiani | city | Dytiki Makedonia | Greece | 40.52 | 21.08 | 2509 | 1862 |
| Óskot | city | Hofudhborgarsvaedhi | Iceland | 64.13 | -21.68 | 321 | 13141 |
| Ósland | city | Nordhurland Vestra | Iceland | 65.84 | -19.35 | 288 | 0 |
| Ósliani | city | Kentriki Makedonia | Greece | 40.71 | 22.00 | 1916 | 1844 |
| Ósopot | city | Caras-Severin | Romania | 44.88 | 21.99 | 892 | 1425 |
| Óspakseyri | city | Vestfirdhir | Iceland | 65.46 | -21.43 | 0 | 0 |
| Óspaksstaðasel | city | Nordhurland Vestra | Iceland | 65.05 | -21.04 | 830 | 0 |
| Óspaksstaðir | city | Iceland | 65.10 | -21.08 | 357 | 0 | |
| Óssa | city | Thessalia | Greece | 39.75 | 22.58 | 830 | 3059 |
| Óstima | city | Dytiki Makedonia | Greece | 40.74 | 21.20 | 3441 | 433 |
| Ószadova | city | Caras-Severin | Romania | 45.25 | 22.30 | 1669 | 2275 |
| Ószaka | city | Osaka | Japan | 34.68 | 135.52 | 13 | 1388107 |
| Ószalónak | city | Burgenland | Austria | 47.32 | 16.28 | 1135 | 7706 |
| Ószanda | city | Jasz-Nagykun-Szolnok | Hungary | 47.10 | 20.22 | 242 | 28369 |
| Ószanda-Nagymajor | city | Jasz-Nagykun-Szolnok | Hungary | 47.10 | 20.22 | 242 | 28369 |
| Ószanda-Újtelep | city | Jasz-Nagykun-Szolnok | Hungary | 47.08 | 20.23 | 236 | 18024 |
| Ószandec | city | Malopolskie | Poland | 49.56 | 20.63 | 980 | 35300 |
| Ószelec | city | Presovsky | Slovakia | 49.03 | 20.35 | 2066 | 33091 |
| Ószemere | city | Zakarpats'ka Oblast' | Ukraine | 48.73 | 22.52 | 830 | 3820 |
| Ószhelylesvár | city | Gyor-Moson-Sopron | Hungary | 47.66 | 17.51 | 354 | 7227 |
| Ószivác | city | Serbia | 45.70 | 19.38 | 341 | 3874 | |
| Ószombat | city | Trnavsky | Slovakia | 48.74 | 17.41 | 912 | 7797 |
| Ószéplak | city | Nitriansky | Slovakia | 48.60 | 18.31 | 830 | 15961 |
| Ószőllő | city | Szabolcs-Szatmar-Bereg | Hungary | 48.17 | 21.83 | 311 | 6313 |
| Ószőllő | city | Szabolcs-Szatmar-Bereg | Hungary | 47.98 | 22.20 | 830 | 7717 |
| Ószőllőskert | city | Szabolcs-Szatmar-Bereg | Hungary | 48.12 | 21.92 | 341 | 7724 |
| Ószőllőskert | city | Szabolcs-Szatmar-Bereg | Hungary | 47.87 | 21.93 | 830 | 5750 |
| Ószőlők | city | Bacs-Kiskun | Hungary | 46.14 | 19.44 | 413 | 2447 |
| Ószőlőskert | city | Szabolcs-Szatmar-Bereg | Hungary | 47.87 | 21.93 | 830 | 5750 |
| Ósándorfalva | city | Zakarpats'ka Oblast' | Ukraine | 48.13 | 23.51 | 830 | 8229 |
| Ósára | city | Borsod-Abauj-Zemplen | Hungary | 48.27 | 21.50 | 308 | 5352 |
| Ósóvé | city | Serbia | 45.45 | 19.62 | 285 | 3874 | |
| Ótecha | city | Cabo Delgado | Mozambique | -12.84 | 39.62 | 1669 | 2384 |
| Ótelek | city | Somogy | Hungary | 46.43 | 17.25 | 830 | 2140 |
| Óthos | city | Notio Aigaio | Greece | 35.53 | 27.15 | 1669 | 2831 |
| Ótompa | city | Csongrad | Hungary | 46.58 | 20.50 | 298 | 3026 |
| Ótompahát | city | Csongrad | Hungary | 46.58 | 20.50 | 298 | 3026 |
| Óttarsstaðir | city | Hofudhborgarsvaedhi | Iceland | 64.05 | -22.09 | 68 | 3024 |
| Óttarstaða | city | Hedmark | Norway | 60.73 | 11.15 | 830 | 3123 |
| Ótura | city | Nitriansky | Slovakia | 48.78 | 17.69 | 859 | 11930 |
| Óvirághegyszőlő | city | Jasz-Nagykun-Szolnok | Hungary | 46.98 | 20.25 | 288 | 13991 |
| Óváros | city | Stredocesky Kraj | Czech Republic | 50.08 | 14.42 | 830 | 195871 |
| Óváros | city | Bratislavsky | Slovakia | 48.15 | 17.09 | 830 | 206671 |
| Óvíz | city | Kosicky | Slovakia | 48.80 | 20.68 | 2529 | 2344 |
| Ózdfalu | city | Baranya | Hungary | 45.93 | 18.02 | 331 | 2479 |
| Óðinsvé | city | Syddanmark | Denmark | 55.39 | 10.39 | 49 | 43849 |
| Ó̤-muòng | city | Macau | 22.20 | 113.55 | 32 | 512508 |