Johannes Bünderlin (b. Linz before 1500 – after 1540) was an Austrian Anabaptist. Bünderlin was a humanist Catholic priest who had been attracted to the Reformation in Moravia and was baptised by Johannes Denck. Bünderlin returned to Linz and preached there until forced to leave for Konstanz in 1529 at the invitation of Johannes Zwick, though Zwick soon considered that Bünderlin was too radical in his ideas and Bünderlin set out for Prussia.