The Nebula Award for Best Novelette is given each year by the Science Fiction and Fantasy Writers Association (SFWA) to a science fiction or fantasy novelette. A work of fiction is defined by the organization as a novelette if it is between 7,500 and 17,500 words; awards are also given out for pieces of longer lengths in the Novel and Novella categories, and for shorter lengths in the Short Story category. To be eligible for Nebula Award consideration a novelette must be published in English in the United States. Works published in English elsewhere in the world are also eligible provided they are released on either a website or in an electronic edition. The Nebula Award for Best Novelette has been awarded annually since 1966. The Nebula Awards have been described as one of "the most important of the American science fiction awards" and "the science-fiction and fantasy equivalent" of the Emmy Awards.

The Science Fiction and Fantasy Writers of America, doing business as Science Fiction and Fantasy Writers Association, commonly known as SFWA is a nonprofit 501(c)(3) organization of professional science fiction and fantasy writers. While SFWA is based in the United States, its membership is open to writers worldwide. The organization was founded in 1965 by Damon Knight under the name Science Fiction Writers of America. The president of SFWA as of July 1, 2021 is Jeffe Kennedy.