Usain Bolt of Jamaica holds the world record at 9.69 seconds set at the 2008 Summer Olympic Games in Beijing. Tyson Gay of the USA ran a wind aided 9.68 at the USA Olympic trials in 2008.
Answer above is incorrect somewhat. the worlds fastest runners are indeed: Usain Bolt, Yohan Blake, Asafa Powell and Tyson Gay. The world record however is 0.58 set by Usain Bolt. The 9.69 Olympic record set by Usain Bolt in Bejing has been lowered. the new world record is 9.63 also set by Bolt in London Olympics 2012.
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