Marcon is a full-spectrum fantasy and science fiction convention based in Columbus, Ohio, normally held over the Memorial Day weekend. (Starting in 2012, Marcon will move to Easter weekend.) It is now operated by the Columbus-based Science Oriented Literature, Art, and Education Foundation, a non-profit educational corporation.
Marcon offers a dozen tracks of programming in art, costuming, fan, filk, literary, media, and science, as well as events and displays including a masquerade, art show, dealers room, multiple 24-hour video tracks, 7,000 square feet (650 m2) of gaming space, and at least one dance. Marcon runs a children's track of programming that has included independent filmmakers helping the kids create their own movies (The Curse of Monster X, Return of the Red Shirts) and many hands-on art, costuming, and science programs. It is the oldest and largest sci-fi convention in the state of Ohio.
"Marcon Ballroom", a filk song by Anne Passovoy about an incident with hotel management failing to adjust to the needs of fandom, was awarded a Pegasus Award as "Best Classic Filk Song" in 2005.