Aleksandr Leonov (Russian: Александр Леонов; born July 17, 1978 in Moscow) is a boxer from Russia, who competed for his native country at the 2000 Summer Olympics in Sydney, Australia.
Leonov is best known for winning the gold medal at 2000 European Amateur Boxing Championships in the Men's Light-Welterweight (– 63.5 kg) division. In the final he defeated Bulgaria's Dimitar Stilianov.