| Otto IV | |
| Count of Ravensberg | |
| Noble Family: | House of Calvelage-Ravensberg |
| Father: | Otto III of Ravensberg |
| Mother: | Hedwig of Lippe |
| Spouse: | Margaret of Berg-Windeck |
| Death Date: | 1328 |
Otto IV, Count of Ravensberg ( - 1328) was a German nobleman. He was the ruling Count of Ravensberg from 1306 until his death.
Otto was the fifth child of Count Otto III and his wife Hedwig of Lippe ( - 5 March 1315), daughter of Bernard III, Lord of Lippe.
In 1313, Otto IV married Margaret of Berg-Windeck. Together, they had two daughters: