G
- (Hastings County) Gilmour
- (Ottawa) Glabar Park
- (Middlesex County) Gladstone
- (Peterborough County) Glamorgan
- (Hastings County) Glanmire
- (Grey County) Glascott
- (Durham) Glasgow
- (Lennox and Addington County) Glastonbury
- (Grey County) Glen
- (Peterborough County) Glen Alda
- (Comtés unis de Prescott et Russell) Glen Andrew
- (Huron County) Glenannan
- (United Counties of Leeds and Grenville) Glen Buell
- (Comtés unis de Prescott et Russell) Glenburn
- (Ottawa) Glen Cairn
- (Elgin County) Glencolin
- (Frontenac County) Glendower
- (United Counties of Leeds and Grenville) Glen Elbe
- (Grey County) Glenelg Centre
- (Lennox and Addington County) Glenfield
- (Durham) Glen Major
- (United Counties of Leeds and Grenville) Glenmore
- (United Counties of Leeds and Grenville) Glen Morris
- (District Municipality of Muskoka) Glenmount
- (Middlesex County) Glen Oak
- (District Municipality of Muskoka) Glen Orchard
- (Lambton County) Glen Rae
- (Simcoe County) Glenrest Beach
- (United Counties of Leeds and Grenville) Glen Smail
- (Lanark County) Glen Tay