DemiCon is an annual volunteer-run science fiction, fantasy, and gaming convention held in Des Moines, Iowa, in early May. DemiCon's host organization is the Des Moines Science Fiction Society (DMSFS), a nonprofit group that promotes literacy, science, and the arts, especially through the enjoyment of science fiction and fantasy.
Programming includes gaming, cosplay, an art show, dealers' room, panels, live music, and film screenings. It also includes steampunk and alternate history activities.
The 2019 theme is "It's About Time." Guests of honor include steampunk author Gail Carriger, artist John Picacio, and Joe & Gay Haldeman.