| Population | Country | City | % Correct |
|---|---|---|---|
| 2,592,413 | Japan | Osaka | 100%
|
| 580,000 | Norway | Oslo | 98%
|
| 934,243 | Canada | Ottawa | 98%
|
| 1,011,494 | Ukraine | Odessa | 94%
|
| 114,428 | United States | Odessa | 94%
|
| 1,475,223 | Burkina Faso | Ouagadougou | 88%
|
| 803,329 | Algeria | Oran | 84%
|
| 1,129,281 | Russia | Omsk | 80%
|
| 681,054 | United States | Oklahoma City | 74%
|
| 307,573 | United States | Orlando | 66%
|
| 171,380 | United Kingdom | Oxford | 50%
|
| 145,931 | Denmark | Odense | 48%
|
| 486,051 | United States | Omaha | 48%
|
| 313,088 | Czechia | Ostrava | 48%
|
| 324,200 | Russia | Orël | 44%
|
| 224,005 | Spain | Oviedo | 44%
|
| 200,000 | Kazakhstan | Oral | 42%
|
| 124,149 | France | Orléans | 40%
|
| 200,000 | Kyrgyzstan | Osh | 40%
|
| 440,646 | United States | Oakland | 38%
|
| 1,849,659 | Sudan | Omdurman | 38%
|
| 128,618 | Finland | Oulu | 38%
|
| 125,483 | Japan | Okinawa | 36%
|
| 115,765 | Sweden | Örebro | 30%
|
| 202,063 | United States | Oxnard | 30%
|
| 550,204 | Russia | Orenburg | 28%
|
| 159,218 | Russia | Oldenburg | 26%
|
| 175,265 | United States | Ontario | 26%
|
| 255,029 | Mexico | Oaxaca | 24%
|
| 639,652 | Japan | Okayama | 24%
|
| 350,280 | Nigeria | Onitsha | 24%
|
| 139,911 | United States | Orange | 24%
|
| 166,462 | Germany | Osnabrück | 24%
|
| 219,176 | Germany | Oberhausen | 22%
|
| 119,192 | Germany | Offenbach am Main | 20%
|
| 104,782 | United Kingdom | Oldham | 18%
|
| 101,268 | Czechia | Olomouc | 18%
|
| 127,676 | Poland | Opole | 18%
|
| 369,894 | Nigeria | Oyo | 18%
|
| 174,068 | United States | Oceanside | 14%
|
| 206,614 | Romania | Oradea | 14%
|
| 302,643 | Bolivia | Oruro | 14%
|
| 197,238 | United States | Overland Park | 14%
|
| 141,290 | United States | Olathe | 12%
|
| 171,803 | Poland | Olsztyn | 10%
|
| 494,252 | Morocco | Oujda | 10%
|
| 448,907 | Japan | Ōita | 8%
|
| 393,115 | Brazil | Olinda | 8%
|
| 107,742 | Spain | Ourense | 8%
|
| 510,242 | China | Ordos City | 6%
|
| 125,347 | Belarus | Orsha | 6%
|
| 699,944 | Brazil | Osasco | 6%
|
| 152,104 | Japan | Ōta | 6%
|
| 121,269 | Chile | Ovalle | 6%
|
| 166,462 | United States | Oakville | 4%
|
| 173,890 | Japan | Obihiro | 4%
|
| 120,844 | Mexico | Orizaba | 4%
|
| 246,836 | Russia | Orsk | 4%
|
| 229,725 | South Korea | Osan | 4%
|
| 298,164 | Japan | Ōtsu | 4%
|
| 119,711 | Nigeria | Owerri | 4%
|
| 107,392 | Russia | Obninsk | 2%
|
| 129,308 | Colombia | Ocaña | 2%
|
| 137,041 | Russia | Odintsovo | 2%
|
| 242,272 | Mexico | Ojo de Agua | 2%
|
| 103,000 | Russia | Oleksandriya | 2%
|
| 172,872 | India | Ongole | 2%
|
| 116,788 | Turkey | Ordu | 2%
|
| 120,000 | Russia | Orekhovo-Zuyevo | 2%
|
| 202,837 | Turkey | Osmaniye | 2%
|
| 173,410 | Chile | Osorno | 2%
|
| 114,352 | Brazil | Ourinhos | 2%
|
| 157,181 | Nigeria | Owo | 2%
|
| 127,600 | Venezuela | Ocumare del Tuy | 0%
|
| 203,035 | Japan | Odawara | 0%
|
| 150,570 | Japan | Ōgaki | 0%
|
| 223,648 | Pakistan | Okara | 0%
|
| 352,361 | Japan | Okazaki | 0%
|
| 312,775 | NIgeria | Okene | 0%
|
| 108,200 | Russia | Oktyabrskiy | 0%
|
| 121,207 | Uzbekistan | Olmaliq | 0%
|
| 221,178 | Philippines | Olongapo | 0%
|
| 149,323 | Japan | Ōme | 0%
|
| 131,974 | Japan | Ōmuta | 0%
|
| 158,265 | India | Orai | 0%
|
| 191,200 | Philippines | Ormoc | 0%
|
| 577,307 | Iran | Orūmīyeh | 0%
|
| 143,792 | Japan | Otaru | 0%
|
| 169,928 | Algeria | Ouargla | 0%
|
| 159,936 | Japan | Oyama | 0%
|