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- (Dufferin County) Bowling Green
- (Durham) Bowmanville
- (Middlesex County) Bowood
- (Manitoulin District) Bowser's Corner
- (Rainy River District) Box Alder
- (Lanark County) Boyds
- (Regional Municipality of Niagara) Boyle
- (District Municipality of Muskoka) Brackenrig
- (Simcoe County) Bradens Bay
- (Simcoe County) Bradford
- (Bruce County) Bradley
- (Frontenac County) Bradshaw
- (Lambton County) Bradshaw
- (Haliburton County) Brady Lake
- (Oxford County) Braemar
- (Ottawa) Braemar Park
- (Renfrew County) Braeside
- (Perth County) Brandy Point
- (Parry Sound District) Bray Lake
- (Simcoe County) Brechin
- (Simcoe County) Brechin Beach
- (Simcoe County) Brechin Point
- (Timiskaming District) Brentha
- (Timiskaming District) Brethour
- (Frontenac County) Brewer Lake
- (Ottawa) Briargreen
- (Peterborough County) Bridgenorth
- (Ottawa) Bridlewood
- (United Counties of Leeds and Grenville) Brier Hill
- (Lanark County) Brightside