The NBA Defensive Player of the Year Award is an annual National Basketball Association (NBA) award given since the 1982–83 NBA season to the best defensive player of the regular season. The winner is selected by a panel of 124 sportswriters and broadcasters throughout the United States and Canada, each of whom casts a vote for first, second and third place selections. Each first-place vote is worth five points, second-place votes are worth three points, and a third-place vote is worth one. The player with the highest point total, regardless of the number of first-place votes, wins the award. Since the 2022–23 NBA season, winners receive the Hakeem Olajuwon Trophy, named after the two-time defensive player of the year winner.

Hakeem Abdul Olajuwon, nicknamed "the Dream", is a Nigerian-American former professional basketball player. From 1984 to 2002, he played center in the National Basketball Association (NBA) for the Houston Rockets, and in his last season, the Toronto Raptors. He led the Rockets to back-to-back NBA championships in 1994 and 1995. Olajuwon was inducted into the Naismith Memorial Basketball Hall of Fame in 2008 and the FIBA Hall of Fame in 2016. He is widely considered to be one of the greatest centers, as well as one of the greatest basketball players of all time.