L
- (Grey County) Landerkin
- (Huron County) Lanes
- (Comtés unis de Prescott et Russell) L'Ange-Gardien
- (Simcoe County) Langman
- (Bruce County) Langside
- (Timiskaming District) Larder Lake
- (Comtés unis de Prescott et Russell) La Renouche
- (Elgin County) Largie
- (Hastings County) Larkins
- (United Counties of Leeds and Grenville) LaRue Mills
- (York) Laskay
- (Peterborough County) Lasswade
- (Renfrew County) Latchford Bridge
- (Frontenac County) Latimer
- (Grey County) Lauderbach
- (Dufferin County) Laurel
- (Ottawa) Laurentian View
- (Simcoe County) Laurin
- (Grey County) Lauriston
- (Lanark County) Lavant
- (Lanark County) Lavant Station
- (Elgin County) Lawrence Station
- (Elgin County) Lawton's Corners
- (Durham) Layton
- (Durham) Leaskdale
- (Wellington County) Lebanon
- (Renfrew County) Ledgerwoods Corner
- (United Counties of Leeds and Grenville) Leeds
- (Simcoe County) Lefaives Corners
- (Dufferin County) Leggatt