City or town with O
- Orlando
- Oslo
- Ottawa
- Oakland
- Oxford
- Omaha
- Osaka
- Olympia
- Oldenburg
- Orleans
- Oklahoma city
- Oakville
- Oldham
- Oshawa
- Ocean City
- Okinawa
- Oswego
- Odessa
- Oviedo
- Oaxaca
- Ogden
- Oceanside
- Orville
- Oberhausen
- OMAN
- Orillia
- Odisha
- ostrava
- Oregon City
- Oban
- Ocala
- Oswestry
- Ozark
- Oberlin
- Oroville
- Oshkosh
- Oneonta
- Omsk
- Offenbach
- Orange City
- Ouagadougou
- Oran
- Oakdale
- Offaly
- Orono
- Orangeburg
- Oamaru
- Ormskirk
- Olney
- Olathe
- OREGON
- Opal
- Ossining
- Opelika
- oakwood
- Orlando Florida
- Oneida
- Oak Park
- Oconomowoc
- Owen sound
- Orion
- Overton
- Owatonna
- Owensboro
- Outer Banks
- Overland Park
- Oahu
- olbia
- organ
- Owen
- Orania
- Oswald
- Osborne
- Oceana
- ottwa
- Old Bridge
- Oak Creek
- Omen
- ONTARIO
- Ocean
- oyster bay
- Olovo
- ommen
- Okehampton
- Olive
- Oberon
- Olean
- Olivia
- Ostia
- Orinda
- Otorohanga
- Otsego
- Oakleigh
- Old town road
- Otley
- open
- orange country
- Orizaba
- Outback
- ottoman
Les mots dans la liste City or town with O proviennent des joueurs du jeu de mots Le Petit Bac.