The Kingslayer is a collection of science fiction short stories by American writer L. Ron Hubbard.

It was first published in 1949 by Fantasy Publishing Company, Inc. in an edition of 1,200 copies.

The title story first appeared in this collection.

The other stories had previously appeared in the magazine Astounding SF.

This article about a collection of science fiction short stories published in the 1940s is a stub.