| Name | Ontario |
| Alt names | ON | source: postal abbreviation |
| Ont. | source: former abbreviation |
| Province d'Ontario | source: NIMA, GEOnet Names Server (1996-1998) |
| Canada West | source: name 1840-1867 |
| Upper Canada | source: name before 1840 |
| Type | Province |
| Located in | Canada (1867 - ) |
| See also | Upper Canada, Canada | name until 1840 |
| Canada West, Canada | 1840-1867 |
