Richard Lewis (born June 29, 1947) is an American comedian and actor.

Lewis began performing stand-up comedy in the 1970s. He worked as a copywriter for an ad agency by day, while honing his stand-up act at night. Lewis gained popularity in the 1980s with numerous appearances on Late Night with David Letterman and his own television specials on HBO. He has starred in the ABC sitcom Anything But Love which ran for four seasons. Lewis has written comic articles for magazines such as Playboy, and endorsed the popular early-1990s beverage, Boku, as well as Snapple and Certs breath mints.

Lewis has also achieved moderate success in films, appearing as Prince John in Robin Hood: Men in Tights, as a frontier doctor in Wagons East!, as an unemployed actor in Once Upon A Crime and as himself in the film The Wrong Guys. He played the lead role of Jimmy Epstein in the dramatic film Drunks and in the 1999 comedy Game Day. He also appeared in the dramatic pictures Leaving Las Vegas, Hugo Pool and The Maze. He made his acting debut in the 1977 TV movie mockumentary Diary of a Young Comic.

He currently has a frequent recurring role as a character based on himself on Larry David's critically acclaimed Curb Your Enthusiasm on HBO. Lewis and David met at summer camp in Cornwall-on-Hudson, New York when they were thirteen. He is #45 on Comedy Central's list of 100 Greatest Standups of All Time.