Marco Antonio Loughran (born 24 March 1989) is an English-born British competitive swimmer who has represented Great Britain at the Olympics and FINA world championships, European Championships and Wales in the Commonwealth Games. He has also competed under Team Europe at Duel in the Pool 2011. In 2013 he won the men's 50-metre backstroke at the British Championships, held in Sheffield. He competed again for Wales at the 2014 Commonwealth Games.