Otto I (also Otho or Ottone; died 991) was the second Marquis of Montferrat briefly following his father Aleram on the throne.
| Otto I, Marquis of Montferrat | |
|---|---|
| Marquis of Montferrat | |
| Reign | 967 – 991 |
| Predecessor | Aleram |
| Successor | William III |
| Died | 991 |
| Issue | William III Riprando Otta Waldrada |
| House | Aleramici |
| Father | Aleram |
| Mother | Adelaide |