WisCon or Wiscon, a Wisconsin science fiction convention, is the oldest, and often called the world's leading, feminist science fiction convention and conference. It was first held in Madison, Wisconsin in February 1977, after a group of fans attending the 1976 34th World Science Fiction Convention in Kansas City was inspired to organize a convention like WorldCon but with feminism as the dominant theme. The convention is held annually in May, during the four-day weekend of Memorial Day. Sponsored by the Society for the Furtherance and Study of Fantasy and Science Fiction, or (SF)³, WisCon gathers together fans, writers, editors, publishers, scholars, and artists to discuss science fiction and fantasy, with emphasis on issues of feminism, gender, race, and class.

Science fiction conventions are gatherings of fans of the speculative fiction genre, science fiction. Historically, science fiction conventions had focused primarily on literature, but the purview of many extends to such other avenues of expression as films, television, comics, animation, and games. The format can vary but will tend to have a few similar features such as a guest of honour, discussion panels, readings and large special events such as opening/closing ceremonies and some form of party or entertainment. Science fiction conventions started off primarily in the UK and US but have now spread further and several countries have their own individual conventions as well as playing host to rotating international conventions.