List of National Basketball Association season blocks leaders

In basketball, a block (short for blocked shot) occurs when a defender deflects or stops a field goal attempt without committing a foul. The National Basketball Association's (NBA) block title is awarded to the player with the highest blocks per game average in a given season. The block title was first recognized in the 1973–74 season when statistics on blocks were first compiled. To qualify for the blocks title, the player must appear in at least 70 games (out of 82) or have at least 100 blocks. This is the requirement since the 1974–75 season, with requirements changing with the schedule length several times before that.

Mark Eaton holds the all-time records for total blocks (456) and blocks per game (5.56) in a season; both achieved in the 1984–85 season.Manute Bol holds the rookie records for total blocks and blocks per game when he had 397 and averaged 5.0 in the 1985–86 season. Among active players, Marcus Camby had the highest season block total (285) in the 2007–08 season and Hassan Whiteside had the highest season block average (3.68) in the 2015–16 season.

Kareem Abdul-Jabbar, Eaton and Marcus Camby all won the most block titles, with four.George Johnson, Manute Bol, Hakeem Olajuwon, Dikembe Mutombo, Alonzo Mourning, Theo Ratliff, Dwight Howard, Anthony Davis, and Serge Ibaka have also won the title more than once. Both Mutombo and Camby have also won the most consecutive block titles, with three. Two players have won both the block title and the NBA championship in the same season: Bill Walton in 1977 with the Portland Trail Blazers and Abdul-Jabbar in 1980 with the Los Angeles Lakers.

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