- Oak Park Village Mobile Home Park
- Ox Pen Island
- Oceanside Village
- Old Callaway
- Open Sands
- Olin's Mobile Home Park
- Oak Manor Mobile Home Park
- Oak Mobile Home Park
- Oak Point Mobile Park
- Old Fort Trailer Park
- Onion Farm Island
- Orange Trailer Manor Mobile Home Park
- Orsino
- Osceola Trailer Park
- Oak Point
- Oak Point (historical)
- Ocean Vue
- Ocean Waterway Mobile Home Park
- Okomo Mobile Home Park
- Orange Blossom Mobile Home Park
- Orange Brook Mobile Home Estates
- Ocheesee
- Ocheesee Landing
- Ozello
- Oakleaf Plantation
- Old Grove
- Old Marco Junction
- Owl Hammock
- Oakview Mobile Home Park
- Oakview Mobile Home Estates