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.
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In compensation for the loss of the Salm-Kyburg princedom on the left bank of the Rhine, the 1803 German Mediatisation granted Salm-Kyburg lordship over a third of a part of the secularised lands of the prince bishops of Munster that had previous belonged to the amts of Bocholt and Ahaus to compensate for his loss in 1801.
He was born in 1371, the natural son of Ludolf, Lord of the principality of Ahaus, and Hadwigis of Schöppingen.
The full title used by the Princes of the resurrected state was "Prince of Salm-Kyrburg, Sovereign Prince of Ahaus, Bocholt and Gemen, Wildgrave of Dhaun and Kyrburg, Rhinegrave of Stein".