Otto IV, Count of Ravensberg

Otto IV (c. 1276–1328) was count of Ravensberg from 1306 until his death, the son of Otto III and Hedwig of Lippe. Destined for the church, he became a canon at Osnabrück and Münster, but returned to secular life to succeed his father.

In 1313 he married Margaret of Berg-Windeck, who bore him only daughters and no son. Through his daughter Margaret's marriage to Gerhard of Jülich, Ravensberg later passed to the counts of Jülich.