City with O
- Orlando
- Oslo
- Ottawa
- Oakland
- Osaka
- Omaha
- Oxford
- Orleans
- Olympia
- Oldenburg
- OOty
- Ocean City
- Odessa
- Oberhausen
- Oshawa
- Reklama
- Ogden
- Okinawa
- Oaxaca
- Oregon City
- Omsk
- Oran
- Oviedo
- Oswego
- Oakville
- Oceanside
- Ouagadougou
- Offenbach
- Orange City
- Oklahoma City
- Ohio City
- Oshkosh
- Oxnard
- Ocala
- Orillia
- Oberlin
- Odisha
- Oakdale
- Oneonta
- Ozark
- Oahu
- ONTARIO
- Orem
- otwock
- Oneida
- Oporto
- Olivia
- Okayama
- Oliver
- Oconomowoc
- Oakley
- Owen sound
- Oban
- Orlando Florida
- Oroville
- Orly
- Overton
- Ostia
- oak park
- Okanagan
- Owensboro
- Reklama
- Oswald
- Olney
- OHIO
- Otago
- Orono
- Oscar
- Omar
- Odesa
- Onalaska
- Oceana
- Old Town
- Osceola
- ostrawa
- ohayo
- Orange Beach
- Omdurman
- Orania
- Obama
- Orland Park
- Oralando
- Oranjestad
- Owatonna
- Othello
- oak bay
- Okla
- Oleśnica
- Opelika
- Omagh
- outer banks
- oasis
- Ostrów Wielkopolski
- Oval
- Ormond Beach
- opal
- Ockland
- Orłowo
- Ozarks
- Otsego
- owl city
- orange cove
Slová v zozname City with O pochádzajú od hráčov slovnej hry Meno, Mesto, Zviera, Vec.