- Oak Grove Addition
- Oak Knoll
- Oak Knoll Trail
- Oakley Street
- Oak Plaza Shopping Center
- Oak Ridge
- Oak Cemetery
- Oberman Park (historical)
- office supplies
- Ohio Street
- Old Bank of Fayetteville Building
- Old Farmington Road
- Old Main
- Old Missouri Road
- Old Post Office
- Old Wire Road
- Oliver Addition
- Oliver Avenue
- One-Two-Three-Fours
- On the Hill
- optometrists
- orchards
- Oriental Hotel
- Osage Line
- Osage Nation
- Osage Prairie
- Osage Trail
- osteopaths
- Ottish Watson Addition
- Overland Mail Co.
- Owl Creek
- Owl Creek School
- Oxford Bend
- Oxford Telephone Manufacturing Co.
- Ozark & Cherokee Central Railway
- Ozark Avenue
- Ozark Institute
- Ozark Modern
- Ozark Opera House
- Ozark Producers Co.
- Ozarks
- Ozark Stables
- Ozark Theatre
- Ozark Trail
- Ozark White Lime Company