· Opelousas is a city in Louisiana
Oklahoma City,OKOlympia,WA
Some southern US cities that start with the letter O:Oak Ridge, TennesseeOcilla, GeorgiaOdessa, TexasOpelika, AlabamaOlive Branch, MississippiOpelousas, LouisianaOrangeburg, South CarolinaOrlando, FloridaOzark, Arkansas
U.S. state capitals that start with the letter O:Oklahoma City, OklahomaOlympia, Washington
Some words that start with the letter O are:oceanOddOdeofoffOfficeogreoldOliveOnoneOpalOppositeorOrangeorboreganoorganismorgasmorigamiotherotteroughtOxymoronoval
Orange is a city in New South Wales, Australia.
Ollur
Oman.
Oruro
· Onida, South Dakota
· Onida, South Dakota
Odintsovo is a city southwest of Moscow, Russia.
Odessa
odessa
· Opelousas is a city in Louisiana
Oakdale is a city in Minnesota
The city at 23° south latitude is Rio de Janeiro in Brazil.