The men's hammer throw competition at the 2012 Summer Olympics in London, United Kingdom was held at the Olympic Stadium on 3–5 August. There were 41 competitors from 32 nations. The event was won by Krisztián Pars of Hungary, the nation's first victory in the men's hammer throw since 1996 and fifth overall. Primož Kozmus of Slovenia, the 2008 winner, took silver. Koji Murofushi of Japan, the 2004 winner, took bronze. Kozmus and Murofoshi were the 12th and 13th men to earn multiple medals in the hammer throw.

Krisztián Pars is a Hungarian hammer thrower. He competed at the Summer Olympics in 2004, 2008, and 2012, winning the gold medal in 2012. He also won the 2012 and 2014 European championships.