"The Diamondback" is a short story by L. Frank Baum. It is one of his rare animal fables that was not published in his lifetime; discovered in the Baum papers with its first page missing, the surviving portion was printed in The Baum Bugle in 1982. "The Diamondback" can be compared to "The Tiger's Eye," another dark animal fable by Baum that was not printed in the author's era.