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- (Lanark County) Glenview
- (York) Glenville
- (Ottawa) Gloucester
- (Ottawa) Gloucester Glen
- (Oxford County) Gobles
- (Frontenac County) Godfrey
- (District Municipality of Muskoka) Go Home
- (Comtés unis de Prescott et Russell) Golden Hill
- (Renfrew County) Golden Lake
- (Kenora District) Goldpines
- (Wellington County) Goldstone
- (Oxford County) Golspie
- (Haliburton County) Gooderham
- (Ottawa) Goodstown
- (Parry Sound District) Gordon Bay
- (Algoma) Gordon Lake
- (Wellington County) Gordonville
- (Grey County) Goring
- (York) Gormley
- (Renfrew County) Goshen
- (Renfrew County) Government Road
- (Northumberland County) Grafton
- (Ottawa) Graham Park
- (Dufferin County) Grand Valley
- (District Municipality of Muskoka) Grandview
- (Middlesex County) Granton
- (Renfrew County) Grants Settlement
- (Hastings County) Graphite
- (Regional Municipality of Niagara) Grassie
- (District Municipality of Muskoka) Grassmere