Marvin Lewis is a professional football coach. He attended Idaho State University, where primarily played linebacker and earned all-Big Sky Conference honors for three consecutive years.

Lewis served as the head coach of the NFL's Cincinnati Bengals for 16 seasons. He came to prominence as the defensive coordinator of the Baltimore Ravens from 1996 to 2001, whose defense in 2000 set the record for the fewest points allowed in a 16-game season and led the franchise to their first Super Bowl title in Super Bowl XXXV. This success resulted in Lewis being named the Bengals' head coach, where he served from 2003 to 2018. Lewis' head coaching tenure oversaw improved fortunes for the struggling Bengals and helped transform the team into postseason contenders. At the time of his hiring, the Bengals had not had a winning season or postseason appearance since 1990 and finished with a franchise-worst 2–14 record. Lewis ended both droughts and led the Bengals to their first AFC North division title in fifteen years. Lewis subsequently guided the Bengals to seven playoff appearances and four division titles, along with a franchise-best five consecutive postseason appearances from 2011 to 2015. He holds the record for most wins as a Bengals head coach at 131 and was named Coach of the Year by the Associated Press in 2009, the first Bengals coach since team founder Paul Brown in 1970 to receive the honor. 

He was also a commentator for the Alliance of American Football (AAF). As of 2021, Lewis is the Assistant to the Head Coach for the Arizona State.