Mitch Pileggi (born 5 April 1952) is an American actor.
A native of Oregon, Pileggi began his career with small roles in B-movies, and guest roles in shows such as Dallas, Walker, Texas Ranger, and China Beach.
After guest-starring as Assistant Director Walter Skinner in a first-season episode of The X-Files in 1994, Pileggi was asked back for several episodes of the second season. The character gradually became the most important character besides the two leads, and remained with the show until its end in 2002.
Pileggi's recent work included starring on the short-lived TV show Tarzan and is now co-starring with Barbara Hershey and Oliver Hudson on The Mountain. In 2005, he began a role as recurring guest character Colonel Steven Caldwell in the second season of the television series Stargate Atlantis.
Pileggi has also done some voice acting, for example playing the githzerai Dak'kon in the video game Planescape: Torment. Another voice acting role he plays is Commissioner James Gordon on the new Kids WB! animated show The Batman. He also hosted the controversial FOX specials Breaking the Magician's Code and Conspiracy Theory: Did We Land on the Moon?