G
- Georgina
- (Manitoulin District) Gore Bay
- (Kawartha Lakes) Ghost Island
- (Perth County) Gads Hill
- (Peterborough County) Galesburg
- (Ottawa) Galetta
- (Simcoe County) Gamebridge Beach
- (Peterborough County) Gannon Beach
- (Peterborough County) Gannon Village
- (Dufferin County) Garafraxa Woods
- (Renfrew County) Garden of Eden
- (United Counties of Leeds and Grenville) Garretton
- (Durham) Gaud Corners
- (Haliburton County) Gelert
- (Simcoe County) Geneva Park
- (Simcoe County) Georgian Highlands
- (Simcoe County) Georgina Beach
- (Thunder Bay District) Geraldton
- (Renfrew County) Germanicus
- (Renfrew County) German Settlement
- (Durham) Gerrow's Beach
- (Manitoulin District) Gibraltar
- (Simcoe County) Gibson
- (Simcoe County) Gilchrist
- (Peterborough County) Gilchrist Bay
- (Grey County) Gildale
- (Timiskaming District) Gillies
- (Lanark County) Gillies Corners
- (Bruce County) Gillies Hill
- (Bruce County) Gillies Lake