The John W. Campbell Memorial Award for Best Science Fiction Novel, or Campbell Memorial Award, was an annual award presented to the author of the best science fiction novel published in English in the preceding calendar year. It was given by several organizations from 1973 to 1979 and then by the Center for the Study of Science Fiction at the University of Kansas until 2019. It was the novel counterpart of the Theodore Sturgeon Award for best short story, awarded at the same conference by the Theodore Sturgeon Literary Trust. The award was named in honor of John W. Campbell (1910–1971), whose science fiction writing and role as editor of Analog Science Fiction and Fact made him one of the most influential editors in the early history of science fiction. The award was established in 1973 by writers and critics Harry Harrison and Brian Aldiss "as a way of continuing his efforts to encourage writers to produce their best possible work." Locus magazine listed it as one of the "major awards" of written science fiction.