Otto (disambiguation)
- 2962 Otto
- Auto (disambiguation)
- Berzerk (video game)
- Hurricane Otto (disambiguation)
- MV Otto
- Mount Otto
- OTTO Motors
- Operation Otto
- Operation Otto (1943)
- Otho (disambiguation)
- Oto (disambiguation)
- Otocinclus
- Otto
- Otto (Greyhawk)
- Otto (dog breed)
- Otto (singer)
- Otto (surname)
- Otto Celera 500L
- Otto Flugmaschinenfabrik
- Otto GmbH
- Otto II, Holy Roman Emperor
- Otto III, Holy Roman Emperor
- Otto IV, Holy Roman Emperor
- Otto Township (disambiguation)
- Otto Waalkes
- Otto cycle
- Otto engine
- Otto the Great
- Otto the Orange
- Otto – Der Film
- Otto's (disambiguation)
- Otto, Count of Cleves
- Otto, Count of Lippe-Brake
- Otto, Count of Looz
- Otto, Count of Vermandois
- Otto, Duke of Lolland and Estonia
- Otto, Indiana
- Otto, Landgrave of Hesse-Kassel
- Otto, Lord of Arkel
- Otto, Lord of Lippe
- Otto, Margrave of the Nordmark
- Otto, New York
- Otto, North Carolina
- Otto, West Virginia
- Otto, Wyoming
- Otto.
- Otto; or, Up with Dead People
- Ottomotto