H
- (Haliburton County) Highland Grove
- (Ottawa) Highland Park
- (Timiskaming District) Hilliardton
- (Simcoe County) Hillsdale
- (District Municipality of Muskoka) Hillside
- (Timiskaming District) Hillview
- (Manitoulin District) Hilly Grove
- (Lennox and Addington County) Hinch
- (Haliburton County) Hindon
- (Haliburton County) Hindon Hill
- (Oxford County) Hink's Corners
- (Ottawa) Hintonburg
- (Simcoe County) Hockley
- (Grey County) Hogg
- (Oxford County) Holbrook
- (Grey County) Holford
- (Oxford County) Holiday
- (United Counties of Leeds and Grenville) Holland
- (Frontenac County) Holleford
- (York) Holly Park
- (Huron County) Holmesville
- (Ottawa) Honeygables
- (District Municipality of Muskoka) Honey Harbour
- (Durham) Honey's Beach
- (Dufferin County) Honeywood
- (Lanark County) Hood
- (Algoma) Hook Island
- (Thunder Bay District) Hook Island
- (Rainy River District) Hook Island
- (Renfrew County) Hopefield