NBL Best Defensive Player Award

The National Basketball League Best Defensive Player is an annual National Basketball League (NBL) award given since the 1980 NBL season to the best defensive player of the regular season. As of the 2023–24 season, the head coach, assistant coach and captain of each team vote for the Defensive Player of the Year. Voters are not allowed to vote for players from their own team. The winner receives the Damian Martin Trophy, which was named in honour of Damian Martin who won the award six times.