The Men's 81 kg event in Judo at the 2024 Summer Olympics was held at the Grand Palais Éphémère in Paris, France on 30 July 2024.

[1][2][3] This is the fourteenth appearance of the men's half middleweight category.

Takanori Nagase defended his Olympic title, Saeid Mollaei represents Azerbaijan as a current nation, but the IOC did not chose him, one of the bronze medalists, Shamil Borchashvili did not qualify and Matthias Casse won by beating Sibghatullah Arab 11-01, then Attila Ungvári 10-00, and lost to eventual champion Nagase Takanori, later Casse won a repechage over François Gauthier-Drapeau 01-00, and lost to Lee Joon-hwan 00-01.