William O'Connor was an American artist whose work appeared in role-playing games, books, video games and concept art.
William O'Connor produced interior illustrations for many Dungeons & Dragons books from 1995, as well as cover art for the Living Greyhawk Gazetteer (2000). He also produced artwork for other games including several game systems by White Wolf, such as Ars Magica and Trinity.
He also wrote instructional art books, such as Dracopedia: A Guide to Drawing the Dragons of the World.
O'Connor was nominated for a Chesley Award in 2002, for Best Gaming-Related Illustration, for Respite card art, "Legend of the Five Rings".
O'Connor also did artwork for Magic: The Gathering.