- Oak Grove
- Oakdale
- Odessa
- Odin
- Ogema
- Olivia
- Orono
- Ortonville
- Oslo
- Ostrander
- Otsego
- O'Dell Island
- O J Mathison Mobile Home Park
- Oak Center
- Oak Grove Mobile Home Park
- Oak Island
- Oak Island
- Oak Knoll
- Oak Manor Mobile Home Village
- Oak Park
- Oak Park
- Oak Ridge Trailer Court
- Oak Terrace
- Oak Terrace Estates
- Oak View Mobile Home Park
- Oakbury
- Oakland
- Oakland Estates Mobile Home Park
- Oakridge
- Oaks Corner