Richard Purtill (1931-2016) was an American philosopher and writer, and Professor Emeritus of Philosophy at Western Washington University, Bellingham, Washington, US. He was a writer of fantasy and science fiction, critical non-fiction on the same genres, and various works on religion and philosophy. He is best known for his novels of the "Kaphtu" universe. He wrote as both Richard Purtill and Richard L. Purtill, a variant form of his name. He was active in professional writing circles, being a member of the Science Fiction and Fantasy Writers of America, the Authors Guild and the National Writers Union.