O
- Oakdale
- Oak Grove
- Oak Park Heights
- Odessa
- Odin
- Ogema
- Ogilvie
- Okabena
- Oklee
- Olivia
- Onamia
- Ormsby
- Orono
- Oronoco
- Orr
- Ortonville
- Osakis
- Oslo
- Osseo
- Ostrander
- Otsego
- Ottertail
- Owatonna
Read more about this topic: List Of Cities In Minnesota (population 5,000+)