O
- Dick Oatts
- Wes Obermueller
- Patrick O'Bryant
- Brian O'Connor §
- Dennis O'Keefe
- Gerald Francis O'Keefe §
- George Olmsted
- Eric Christian Olsen §
- James Bradley Orman
- Kay A. Orr
- Kyle Orton
- Charles Osborne
- Beverley Owen
Read more about this topic: List Of People From Iowa