Urbanus Henricus Rhegius or Urban Rieger (May 1489, in Langenargen – 23 May 1541, in Celle) was a Protestant Reformer who was active both in Northern and Southern Germany in order to promote Lutheran unity in the Holy Roman Empire.
The son of Konrad Rieger, a priest, was educated in Lindau and studied in Freiburg im Breisgau, Ingolstadt, Tübingen and Basel, at Johannes Eck. In 1519, he was ordained a priest in Konstanz, and in 1520, he became preacher in Augsburg.