John of Schleswig-Holstein-Gottorp, nicknamed Bishop Hans called Hans Bishop, (18 March 1606 at Gottorf Castle – 21 February 1655 in Eutin), was a Lutheran Administrator of Prince-Bishopric of Lübeck.

John was the first Administrator of Lübeck to take permanent residence at Eutin Castle, which he kept expanding.

He tried to draw scholars and scientists to his court and to promote the economic development of the prince-bishopric, but his efforts were hampered by the outbreak of the plague in the years 1638 and 1639, while at the same time the Thirty Years' War imposed additional burdens on the country.

John managed to avert this danger by carefully selecting his negotiators; first David Gloxin from Lübeck, then his councillor Christian Cassius.

John married on 7 May 1640 to Princess Julia Felicitas (1619-1661), a daughter of Duke Julius Frederick of Württemberg-Weiltingen.