Judeichthys is an extinct genus of prehistoric gonorynchiform ray-finned fish that lived during the lower Cenomanian age of the Cretaceous. There is one currently known species, Judeichthys haasi, which was found near Ramallah in Palestine. The genus was named after the Judaean Mountains where it was discovered, while the species was named after professor Georg Haas. It reached a total length of about .