William Laird Cowher (born May 8, 1957) is an American sports analyst, former football player and coach. Following a six-year playing career as a linebacker in the National Football League (NFL), he served as a head coach in the NFL for 15 seasons with the Pittsburgh Steelers. He began his coaching career as an assistant under Marty Schottenheimer for the Cleveland Browns and Kansas City Chiefs, serving as the latter's defensive coordinator from 1989 to 1991. Cowher was named head coach of the Steelers in 1992, whom he led until his retirement following the 2006 season. After retiring, he joined The NFL Today as a studio analyst.

Under Cowher, Pittsburgh won eight division titles, two AFC Championship Games, and Super Bowl XL. Cowher's Super Bowl victory marked the first championship title for the franchise in over two decades and the first not to be won by Chuck Noll, his predecessor. The Steelers appeared in the postseason 10 times with Cowher, including six consecutive appearances from his 1992 hiring to 1997, which made him the second NFL head coach to reach the playoffs during his first six seasons after Paul Brown. He was inducted to the Pro Football Hall of Fame in 2020.