Alan Williams (born November 4, 1969) is an American football coach and former player. He is currently the defensive coordinator for the Minnesota Vikings of the National Football League (NFL), a position he assumed in January 2012. He played running back at the College of William and Mary where he was a teammate of Pittsburgh Steelers' head coach, Mike Tomlin.
Williams got his first NFL coaching experience coaching under Tony Dungy in the Tampa Bay Buccaneers organization in 2001. The following year, Williams followed Tony Dungy to the Indianapolis Colts where he served as the defensive backs coach for the Colts from 2002 to 2011. On January 19, 2012, he was hired to be the defensive coordinator of the Minnesota Vikings.
|Minnesota Vikings Defensive Coordinators|
| Succeeded by|
|Current defensive coordinators of the National Football League|
|American Football Conference|
|AFC East||AFC North||AFC South||AFC West|
|National Football Conference|
|NFC East||NFC North||NFC South||NFC West|