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: