The siege of Trarbach (10 April – 2 May 1734) was conducted during the War of the Polish Succession by French troops against a garrison of troops of the Holy Roman Empire in the fortress at Trarbach in the County of Sponheim, a small principality of the Holy Roman Empire (Trarbach is now in Rhineland-Palatinate, Germany). The French, led by Marshal Belle-Isle, were victorious, and destroyed the fortress.