| Ottavio Farnese | |
|---|---|
_-_Ottavio_Farnese_(1525-86),_2nd_Duke_of_Parma_and_Piacenza_-_CC446_-_Cobbe_Collection.jpg) Portrait by Maso da San Friano, c. 1551 | |
| Duke of Parma and Piacenza | |
| Reign | 10 September 1547 – 18 September 1586 |
| Predecessor | Pier Luigi |
| Successor | Alexander Farnese |
| Duke of Castro | |
| 1st reign | 1545 –1547 |
| Predecessor | Pier Luigi Farnese |
| Successor | Orazio Farnese |
| 2nd Reign | 1553 – 1586 |
| Successor | Alexander Farnese |
| Born | 9 October 1524 Valentano, Papal States |
| Died | 18 September 1586 (aged 61) Piacenza, Duchy of Parma and Piacenza |
| Burial | |
| Spouse | Margaret of Parma |
| Issue | Alexander Farnese, Duke of Parma |
| House | Farnese |
| Father | Pier Luigi Farnese, Duke of Parma |
| Mother | Gerolama Orsini |
Ottavio Farnese (9 October 1524 – 18 September 1586) reigned as Duke of Parma and Piacenza from 1547 until his death and Duke of Castro from 1545 to 1547 and from 1553 until his death.