Marvin Ronald Lewis (September 23, 1958) is the head coach of the Cincinnati Bengals of the National Football League (NFL) since January 14, 2003.

In 2005, he led the Bengals to their first winning season and division title in 15 years. He currently holds the highest regular season winning percentage of any coach in Bengals history

In addition to playing quarterback and safety at Fort Cherry (Pa.) High School, Lewis wrestled and played baseball. He was a three-time All-Big Sky Conference linebacker with Idaho State University but was not drafted out of college and never played in the NFL.