| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| オシャワ | city | Ontario | Canada | 43.90 | -78.87 | 344 | 107455 |
| オタワ | city | Ontario | Canada | 45.42 | -75.70 | 246 | 210946 |
| オリリア | city | Ontario | Canada | 44.60 | -79.42 | 830 | 37350 |
| オーウェンサウンド | city | Ontario | Canada | 44.57 | -80.85 | 1010 | 3378 |
| オークビル | city | Ontario | Canada | 43.45 | -79.67 | 246 | 57720 |
| オーロラ | city | Ontario | Canada | 44.00 | -79.47 | 905 | 87455 |