Cities where you can find Esso branches
- Oak Bay (1)
- Oak Bluff (1)
- Oakbank (1)
- Oakland (1)
- Oakville (7)
- Odessa (1)
- Okanagan Falls (1)
- Okotoks (2)
- Old Perlican (1)
- Oldcastle (1)
- Olds (2)
- Oliver (1)
- Onion Lake (1)
- Orangeville (3)
- Orillia (2)
- Orleans (3)
- Ormstown (1)
- Oro Station (1)
- Oromocto (1)
- Orono (2)
- Oshawa (4)
- Ottawa (12)
- Outlook (1)
- Owen Sound (1)
- Oxbow (1)
- Oyster Bed (1)