The Defensive Player of the Year Award is given by the Associated Press (AP) to the most outstanding defensive player in the National Football League (NFL) at the end of every season. It has been awarded since 1971. The winner is decided by votes from a panel of 50 AP sportswriters. Since 2011, the award has been presented at the annual NFL Honors ceremony the day before the Super Bowl, along with other AP awards, such as the AP NFL Offensive Player of the Year Award, AP NFL Most Valuable Player Award, and AP NFL Rookie of the Year Award. The most recent winner of the AP Defensive Player of the Year award is defensive end Myles Garrett of the Cleveland Browns.

The Associated Press (AP) is an American not-for-profit news agency headquartered in New York City. Founded in 1846, it operates as a cooperative, unincorporated association, and produces news reports that are distributed to its members, major U.S. daily newspapers and radio and television broadcasters. Since the award was established in 1917, the AP has earned 58 Pulitzer Prizes, including 35 for photography. The AP is also known for its widely used AP Stylebook, its AP polls tracking NCAA sports, and its election polls and results during US elections.