Frederik IV Ernst Otto Philip Anton Furnibert (Paris, 14 December 1789 – Brussels, 14 August 1859) was prince of Salm-Kyrburg, Ahaus and Bocholt from 1794 to 1813. He was the son and successor to Frederick III and his wife Johanna Franciska of Hohenzollern-Sigmaringen. He initially had two elder brothers and one younger sister, but all three of these died young.