Mark A. Nelson is an artist and illustrator whose work has appeared in comics, role-playing games, and card games.
Nelson attended the Cleveland Institute of Art and received his M.A. from the University of Michigan. He taught at Northern Illinois University for twenty years. From the late 1990s to the mid-2000s, Nelson worked for Raven Software doing conceptual work, painting digital skins, and creating textures for computer games. During this period, he was an animation instructor at Madison Area Technical College.

Nelson was art director/head concept artist at Pi Studios in Houston from 2008 to 2011. He now runs his own studio (along with his wife, Anita), Grazing Dinosaur Press.