Black Legion of Callisto is a science fiction novel written by Lin Carter, the second in his Callisto series. It was first published in paperback by Dell Books in December 1972, and reprinted twice through January 1974. The first British edition was published by Orbit Books in 1975. It was later gathered together with Jandar of Callisto into the omnibus collection Callisto: Volume 1 (2000). The book includes an appendix ("A Note on the Thanatorian Language") collating background information from this and the previous volume.