The men's 200 metres at the 2008 Summer Olympics took place on 18–20 August at the Beijing National Stadium. There were 63 competitors from 53 nations. Jamaican Usain Bolt set a new world record of 19.30 seconds in the final, and won by the largest margin of victory in an Olympic 200 metres final. It was Jamaica's first victory in the event since 1976 and second overall, matching Canada and Italy for second-most. The apparent silver and bronze medalists, Churandy Martina of the Netherlands Antilles and Wallace Spearmon of the United States, were both disqualified. Those medals went to Americans Shawn Crawford and Walter Dix, who had been fourth and fifth across the finish line; Crawford gave his silver medal to Martina afterward. Crawford was the 10th man to win two medals in the 200 metres, and the third for whom those medals were gold and silver; nobody had yet won two gold medals.

Usain St. Leo Bolt is a retired Jamaican sprinter, widely considered to be the greatest sprinter of all time. He is the world record holder in the 100 metres, 200 metres, and 4 × 100 metres relay.