The IKS Ul'lud was a Klingon Imperial Defense Force starship in service in the 23rd century.

In 2269, the Ul'lud was under the command of Captain Amagh, who was an expert botanist. He kept some fire blossom flowers on board. The USS Potemkin discovered the derelict Ul'lud, and salvaged a number of items on the vessel, including the fire blossoms. The flowers were given to the chief administrator on Beta Canzandia III. When the IKS Kad'nra raided the planet, the flowers were identified as coming from the Ul'lud. (TOS novel: Faces of Fire)