Sergey Morgunov (born 9 February 1993) is a Russian track and field athlete, specializing in the long jump. On 20 June 2012 he set the World Junior Record in the event, jumping 8.35m (with a +1.1 wind) in Cheboksary, Russia. The jump surpassed the longest standing record on the books, set by Randy Williams while winning the gold medal at the 1972 Olympics. Morgunov's jump, set while winning the Russian Junior Championships also tied him for the best jump of the year, by any athlete, to that point in the 2012 Olympic year. The mark also qualified as the European Junior Record, formerly held by Spain's Eusebio Caceres.