by List, USA (funnet 17 elementer). Liste av stedene starter med "O":
Oak Ridge, Tennessee
Oakland, California
Oakland Park, Florida
Ocala, Florida
Oceanside, California (2 elementer)
Odessa, Texas
O'fallon, Missouri
Oklahoma City, Oklahoma
Olathe, Kansas
Omaha, Nebraska (2 elementer)
Ontario, California
Opportunity, Washington
Orange, California (2 elementer)
Orlando, Florida (2 elementer)
Ottumwa, Iowa
Overland Park, Kansas
Oxnard, California