Johannes Nauclerus (Naucler, Naukler) (c. 1425 – May 1, 1510) was a 16th-century Swabian historian and humanist.
In 1502, Nauclerus assumed the office of a judge of the Swabian League, which he held until his death.
He is the author of the World Chronicle (Memorabilium omnis aetatis et omnium gentium chronici commentarii, 1516), printed posthumously, with its foreword written by Johann Reuchlin.
Nauclerus consulted an unusually large number of different sources (such as an account by Eilmer of Malmesbury), indicating that he was already committed to the new spirit of humanism.
Some of the sources he consulted no longer exist; their contents are only known through Nauclerus' work.