For the Canadian mountain, see Mount Syphax. For the mythological figure, see Sufax. There is also a genus of fossil spiders Syphax (Thomisidae).

Syphax was a king of the ancient Numidian tribe Masaesyli of western Numidia during the last quarter of the 3rd century BC. His story is told in Livy's Ab Urbe Condita (written c. 27-25 BC).