D
- (Lambton County) Duthill
- (Haliburton County) Dutch Line
- (Grey County) Durham
- (Simcoe County) Duntroon
- (Ottawa) Dunrobin Shore
- (Ottawa) Dunrobin
- (Bruce County) Dunblane
- (Oxford County) Dunn's Corner
- (Northumberland County) Dunnette Landing
- (Huron County) Dunlop
- (Simcoe County) Dunkerron
- (Bruce County) Dunkeld
- (Northumberland County) Dundonald
- (Regional Municipality of Niagara) Dundas
- (Grey County) Dundalk
- (Middlesex County) Duncrief
- (Grey County) Duncan
- (Parry Sound District) Doe Lake
- (Renfrew County) Deacon
- (Lanark County) Dalhousie Lake
- (Kawartha Lakes) Delamere Island
- (Middlesex County) Dejong
- (Haliburton County) Deer Lake
- (Simcoe County) Deerhurst
- (Peterborough County) Deer Bay
- (Haliburton County) Deep Bay
- (District Municipality of Muskoka) Dee Bank
- (Rainy River District) Dearlock
- (Simcoe County) Deanlea Beach
- (Algoma) Dean Lake