Cities where you can find Petro-Canada branches
- Macamic (1)
- Mackenzie (1)
- Macklin (1)
- Madeira Park (1)
- Magog (3)
- Maidstone (2)
- Malartic (1)
- Maple Ridge (6)
- Markham (11)
- Marysville (1)
- Mascouche (2)
- Mashteuiatsh (1)
- Matane (3)
- McBride (1)
- McLeod Lake (1)
- Meadow Lake (2)
- Medicine Hat (5)
- Melfort (1)
- Mercier (1)
- Merritt (1)
- Middle Sackville (1)
- Middleton (1)
- Midland (1)
- Mill Bay (1)
- Millet (1)
- Millgrove (1)
- Milton (5)
- Minto (1)
- Mirabel (4)
- Miramichi (3)
- Mission (3)
- Mississauga (34)
- Monastery (1)
- Moncton (5)
- Mont-Joli (2)
- Mont-Laurier (2)
- Mont-Royal (1)
- Mont-Saint-Hilaire (2)
- Mont-Tremblant (2)
- Montague (1)
- Montréal-Nord (1)
- Montréal (25)
- Moose Jaw (2)
- Morinville (1)
- Morris (1)
- Mount Forest (1)
- Mount Hope (1)