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O

City Name	City Code(s)
O'Leary, NS	902
Oak Lake, MB	204
Oak River, MB	204
Oakbank, MB	204
Oakburn, MB	204
Oakville, MB	204
Oakwood, ON	705
Oba, ON	705
Ochre River, MB	204
Odessa, SK	306
Ogoki, ON	807
Old Crow, YT	867
Old Perlican, NF	709
Omemee, ON	705
Ontario	705, 807
Ontario (northwest)	807
Opasatika, ON	705
Ophir, ON	705
Orillia, ON	705
Oro, ON	705
Oromocto, NB	506
Osler, SK	306
Otter Lake, ON	705
Outlook, SK	306
Oxbow, SK	306
Oxdrift, ON	807
Oxford House, MB	204
Oxford, NS	902