| Population | Country | City | % Correct |
|---|---|---|---|
| 2,691,000 | Japan | Osaka | 97%
|
| 666,000 | Norway | Oslo | 97%
|
| 934,000 | Canada | Ottawa | 94%
|
| 1,011,000 | Ukraine | Odessa | 83%
|
| 1,475,000 | Burkina Faso | Ouagadougou | 82%
|
| 803,000 | Algeria | Oran | 73%
|
| 277,000 | USA | Orlando | 71%
|
| 1,178,000 | Russia | Omsk | 68%
|
| 638,000 | USA | Oklahoma City | 67%
|
| 447,000 | USA | Omaha | 52%
|
| 420,000 | USA | Oakland | 46%
|
| 291,000 | Czech Republic | Ostrava | 45%
|
| 719,000 | Japan | Okayama | 37%
|
| 1,850,000 | Sudan | Omdurman | 35%
|
| 564,000 | Russia | Orenburg | 26%
|
| 428,000 | Nigeria | Oyo | 18%
|
| 41,000 | Australia | Orange | 16%
|
| 494,000 | Morocco | Oujda | 12%
|
| 478,000 | Japan | Oita | 10%
|
| 230,000 | Russia | Orsk | 9%
|
| 265,000 | Bolivia | Oruro | 9%
|
| 383,000 | Brazil | Olinda | 5%
|
| 698,000 | Brazil | Osasco | 5%
|
| 14,000 | New Zealand | Oamaru | 3%
|
| 510,000 | China | Ordos | 3%
|
| 144,000 | Chile | Osorno | 3%
|
| 126,000 | Venezuela | Ocumare del Tuy | 2%
|
| 27,000 | Australia | Ocean Grove | 1%
|