Catherine Lucille Moore (January 24, 1911 – April 4, 1987) was an American science fiction and fantasy writer, who most often used the pen name C. L. Moore. She was among the first women to write in either genre (though earlier woman writers in these genres include Sophie Wenzel Ellis, Clare Winger Harris, Lilith Lorraine, Greye La Spina, Francis Stevens, Leslie F. Stone, and Everil Worrell).

Moore’s work paved the way for many other female speculative fiction writers. She and her first husband Henry Kuttner were prolific co-authors under their own names and three pseudonyms (Lawrence O’Donnell, C. H. Liddell, and Lewis Padgett).