Cities where you can find The United Church of Canada branches
- O'Leary (1)
- Oak Hill (1)
- Oak Lake (1)
- Oak River (1)
- Oakbank (1)
- Oakland (1)
- Oakville (1)
- Oakville (8)
- Oakwood (1)
- Ochre River (1)
- Odessa (1)
- Ogema (1)
- Ohsweken (2)
- Oil Springs (1)
- Oka (1)
- Okanagan Falls (1)
- Okotoks (1)
- Old Barns (1)
- Old Perlican (2)
- Olds (1)
- Oliver (1)
- Omemee (2)
- Orangeville (1)
- Orillia (6)
- Orleans (2)
- Ormstown (1)
- Oromocto (1)
- Orono (1)
- Orton (1)
- Osborne Harbour (1)
- Osgoode (1)
- Oshawa (8)
- Osoyoos (1)
- Ottawa (20)
- Otterville (1)
- Outlook (1)
- Owen Sound (5)
- Oxbow (1)
- Oxford Mills (1)
- Oxford Station (1)
- Oyen (1)