Timothy Richard Heidecker (; born February 3, 1976) is an American comedian, writer, director, actor, and musician. Along with Eric Wareheim, he is a member of the comedy duo Tim & Eric.

He has also appeared in films, including Bridesmaids (2011), Tim and Eric's Billion Dollar Movie (2012), The Comedy (2012), Ant-Man and the Wasp (2018), and Us (2019). He currently co-hosts the parodic film review web series On Cinema and stars in the comedy series Decker alongside Gregg Turkington and hosts a weekly call-in show, Office Hours Live with Tim Heidecker, with DJ Douggpound and Vic Berger.