Johann IV of Osnabrück (18 April 1529 – 5 April 1574) was a German nobleman and prince-bishop. From his father Johann VII's death in 1535 onwards he was known as Count (Graf) Johann VIII von Hoya zu Stolzenau. From 1553 (as Johann IV) he was Prince-Bishop of Osnabrück, then from 1566 (as Johann III) Prince-Bishop of Münster and finally from 1568 (as Johann II) administrator of the Bishopric of Paderborn.