Johannes Jansen may refer to:
Johannes Henricus Gerardus Jansen (1868–1936), archbishop of Utrecht and Roman Catholic Primate of the Netherlands Johannes Jansen (mayor), mayor of New York, 1725–1726 Johannes J.G. Jansen (1942–2015), scholar of contemporary Islam in the Netherlands Johannes Janssen (1829–1891), German historian
See also Hans Jansen (disambiguation) Johannes Jansen House, Shawangunk, New York