The Mutual Broadcasting System was an American radio network. It broadcast radio shows from 1934 to 1999. It was also called Mutual Broadcasting Company; Mutual; or the Mutual Broadcasting System, Inc.

Mutual broadcast radio shows, such as The Lone Ranger, The Adventures of Superman, and The Shadow. It broadcast baseball games, including the All-Star Game and World Series, and football games for the University of Notre Dame. From 1978 to 1994, it broadcast the Larry King Show.