H
- (Ottawa) Hawthorne Meadows
- (Oxford County) Hawtrey
- (United Counties of Leeds and Grenville) Hayes Corners
- (Parry Sound District) Hayes Corners
- (Lanark County) Hay's Shore
- (Ottawa) Hazeldean
- (Hastings County) Hazzards Corners
- (Ottawa) Healey's Heath
- (Ottawa) Hearts Desire
- (Timiskaming District) Heaslip
- (United Counties of Leeds and Grenville) Heckston
- (District Municipality of Muskoka) Hekkla
- (Grey County) Hemstock Mills
- (Comtés unis de Prescott et Russell) Henrys Corner
- (Ottawa) Herbert Corners
- (Dufferin County) Hereward
- (York) Heritage Park
- (Hastings County) Hermon
- (Ottawa) Heron Gate
- (Ottawa) Heron Park
- (United Counties of Leeds and Grenville) Herrons Corners
- (Lanark County) Herrons Mills
- (Perth County) Hesson
- (Ottawa) Hiawatha Park
- (Hastings County) Hickey Settlement
- (Middlesex County) Hickory Corner
- (Oxford County) Hickson
- (Lanark County) High Falls
- (Timiskaming District) Highland
- (Durham) Highland Beach