Slave Ship is a 1956 short science fiction novel by American writer Frederik Pohl, originally serialized in Galaxy.

The plot involves telepathy, speaking to animals, and, in the last few pages, an invasion by extraterrestrials.

The nominal adversaries in the novel are known as "cow-dyes", a corruption of Caodai, a religion of Vietnamese origin.

Galaxy reviewer Floyd C. Gale praised the novel as "an authentically convincing picture of a wartime navy and .

Boucher praised Pohl for his "Heinleinesque skill in the detailed indirect exposition of a convincing future," but faulted the novel as episodic, weakly characterized, and arbitrarily resolved.