This category lists communities in the Canadian province of Ontario.
The category should only list communities that are part of larger incorporated municipalities; a community that has municipal status should be listed in a category such as Category:Cities in Ontario, Category:Towns in Ontario or Category:Townships of Ontario.
This category has the following 20 subcategories, out of 20 total.
- Ontario populated places on the Detroit River (2 C, 3 P)
- Cities in Ontario (57 C, 53 P)
- Designated places in Ontario (123 P)
- Former populated places in Ontario (3 C, 4 P)
- Indian reserves in Ontario (10 C, 24 P)
- Local services boards in Ontario (46 P)
- Metropolitan areas of Ontario (3 C, 6 P)
- Mining communities in Ontario (1 C, 22 P)
- Municipalities in Ontario (6 C, 1 P)
- Neighbourhoods in Ontario (36 C, 3 P)
- Port settlements in Ontario (9 P)
- Railway towns in Ontario (12 P)
- Towns in Ontario (46 C, 89 P)
- Townships of Ontario (3 C, 1 P)
- Unorganized areas in Ontario (17 P)
- Villages in Ontario (1 C, 11 P)