- Oakland Hills
- Oakland Park
- Oaklane Estates
- Oaklyn
- Oakmeadows West
- Oakmont Manor
- Oakmont Park
- Oakrest
- Oakridge
- Oakridge Manor
- Oaks at Riverview
- Oaks at Valrico
- Oaks at Windemere
- Oakview Estates
- Oakwood
- Oakwood Estates
- Oakwood Forest
- Oakwood Heights
- Oakwood Knoll
- Oakwood Ravine
- Oakwood Villa
- Occident
- Ocean Harbor
- Odessa Woods
- Old Bayshore Point
- Old Fashioned Acres
- Old Hickery
- Old Hillsborough Estates
- Oldsmar Farm
- Oliver Acres