Count Palatine Gustav Samuel Leopold of the House of Wittelsbach (12 April 1670, Stegeborg Castle near Söderköping, Sweden – 17 September 1731, Zweibrücken, Germany) was the Count Palatine of Kleeburg from 1701 until 1731 and the Duke of Zweibrücken from 1718 until 1731. His titles included: 5th Duke of Stegeborg (in Sweden), Count Palatine of the Rhine, and Duke in Bavaria. He was the last male member of the Kleeburg line of the House of Wittelsbach to reign.