Martha Wells (born September 1, 1964) is an American writer of speculative fiction. She has published a number of science fiction and fantasy novels, young adult novels, media tie-ins, short stories, and nonfiction essays on SF/F subjects; her novels have been translated into twelve languages. Wells is praised for the complex, realistically detailed societies she creates; this is often credited to her academic background in anthropology.

She has won four Hugo Awards, two Nebula Awards and three Locus Awards for her science fiction series The Murderbot Diaries. Wells is also known for her fantasy series Ile-Rien and The Books of the Raksura.