The men's 200 metres competition at the 2012 Summer Olympics in London, United Kingdom was held at the Olympic Stadium on 7–9 August. There were 54 competitors from 40 nations. The event was won by Usain Bolt of Jamaica, the first man to repeat as champion in the 200 metres. His teammates Yohan Blake (silver) and Warren Weir (bronze) completed the medal sweep; it was the seventh sweep in the men's 200 metres and the first by a nation other than the United States. Bolt's gold medal was Jamaica's third in the event, moving out of a tie with Canada and Italy for second-most overall.

Christophe Lemaitre is a French sprinter who specialises in the 100 and 200 metres. In 2010, Lemaitre became the first white athlete to break the 10-second barrier in an officially timed 100 m event. Lemaitre has run a sub-10 second 100m on seven occasions: three times in 2010 and four times in 2011. He won a bronze medal in the 4 × 100 m relay at the 2012 London Olympic Games and in the 200 metres at the Rio 2016 Summer Olympics.