The Treaty of Xanten (German: Vertrag von Xanten) was signed in the Lower Rhine town of Xanten on November 12, 1614 between Wolfgang William, Duke of Palatinate-Neuburg and John Sigismund, Elector of Brandenburg, with representatives from England and France serving as mediators.

The treaty ended the War of the Jülich succession and all hostilities between Wolfgang William and John Sigismund. Based on the terms of the treaty, the territories of Jülich-Berg and Ravenstein went to Wolfgang William. Moreover, the territories of Cleves-Mark and Ravensberg went to John Sigismund. These last territories were the first Rhine provinces to be governed by the House of Hohenzollern, and were the oldest constituents of the future Prussian Rhineland.