Thomas Lennon (born August 9, 1970) is an American actor, comedian, writer and director. He is best known for his role of Lieutenant Jim Dangle on the Comedy Central series Reno 911!.

He is a native of Oak Park, Illinois, U.S., and a 1988 graduate of Oak Park River Forest High School. Lennon is married to actress Jenny Robertson.

Lennon originally met Kerri Kenney, fellow member of The State and Reno 911!, at age sixteen in theater camp. After graduation, Lennon attended New York University (NYU). Thereafter he joined a sketch comedy group called The New Group, the core members of which were the basis of the future comedy group The State.