H
- (York) Happy Valley
- (Parry Sound District) Hardie Island
- (Renfrew County) Hardwood Lake
- (Grey County) Harkaway
- (United Counties of Leeds and Grenville) Harlem
- (Huron County) Harlock
- (Frontenac County) Harlowe
- (Perth County) Harmony
- (Algoma) Harmony
- (Lanark County) Harper
- (Renfrew County) Harriets Corners
- (Middlesex County) Harrietsville
- (Oxford County) Harrington
- (Timiskaming District) Harris
- (Simcoe County) Harry's Corner
- (Thunder Bay District) Harstone
- (Parry Sound District) Hartfell
- (Frontenac County) Hartington
- (Hastings County) Hartsmere
- (Cochrane District) Harty
- (Ottawa) Harwood Plains
- (Grey County) Hatherton
- (Peterborough County) Haultain
- (Peterborough County) Havelock
- (Hastings County) Havergal
- (United Counties of Leeds and Grenville) Hawkes
- (Simcoe County) Hawkestone
- (Simcoe County) Hawkestone Beach
- (Regional Municipality of Waterloo) Hawkesville
- (Simcoe County) Hawkins Corners