Michael Tullis Nolan (born March 7, 1959) is an American football coach. Nolan previously served as a head coach for the San Francisco 49ers, and a defensive coordinator for the National Football League (NFL)'s Baltimore Ravens, New York Jets, Washington Redskins, New York Giants, Denver Broncos, Miami Dolphins, Atlanta Falcons, and Dallas Cowboys. Nolan is a former linebackers coach for the Denver Broncos, San Diego Chargers, and New Orleans Saints.

Nolan attended the University of Oregon and was a three-year letterman in football and starter at safety.

Nolan had coached at the collegiate level at Stanford University, Rice University, and LSU before moving on to the National Football League.

In 1987, Nolan was hired by the Denver Broncos as a special teams coach under head coach, Dan Reeves. In 1989, he was promoted to linebackers coach.

In 1993, Nolan followed Dan Reeves to the New York Giants and he was hired as defensive coordinator.

In 1997, Nolan was hired as defensive coordinator for the Washington Redskins.

In 2000, Nolan was hired by the New York Jets as their defensive coordinator under head coach Al Groh.

In 2001, Nolan was hired as wide receivers coach for the Baltimore Ravens. He was promoted to defensive coordinator in 2002.