Michael Shannon (born 1972) is an American stage and film actor.

Born in Lexington, Kentucky, Shannon began his career as a stage actor in Chicago, where he helped found A Red Orchid Theatre. He has since worked with Steppenwolf Theatre Company, Northlight Theatre, and other groups.

Shannon originated the role of Peter Evans in Bug in 2004 and is also starring in the 2007 film adaptation with Ashley Judd and Harry Connick, Jr, directed by William Friedkin. His roles in Bug, Killer Joe, and Man From Nebraska were written by Steppenwolf ensemble member Tracy Letts.

Shannon has appeared in several shows in the West End in London, including a production of Woyzeck directed by Sarah Kane.