Adelaide United Football Club is a professional soccer club based in Adelaide, South Australia, Australia. The club participates in the A-League under licence from Football Federation Australia. The club was founded in 2003 to fill the place vacated by Adelaide City and West Adelaide in the former National Soccer League (NSL), and is now the sole team from the state of South Australia in the A-League. Adelaide United's home ground is Hindmarsh Stadium. Adelaide United were premiers in the inaugural 2005–06 A-League season, finishing 7 points clear of the rest of the competition, before finishing third in the finals. They were Premiers again in 2015/16 finishing just one point ahead of second place Western Sydney. The Reds made the Grand Finals of the 2006–07, 2008–09 and 2015–16 seasons, losing the on the first two occasions to Melbourne Victory. However, Adelaide are the current A-League champions, having won their first Grand Final on 1 May 2016 against Western Sydney.
Adelaide United holds the record for the largest win in an A-League game and the most goals scored in one game. Adelaide defeated North Queensland Fury 8–1 at Hindmarsh Stadium on 21 January 2011. It was also the first time – and, to date, remains the only time – a team had two players score hat-tricks in a single match: one to Marcos Flores and the other to Sergio van Dijk. In 2014, Adelaide United were the winners of the first FFA Cup, beating Perth Glory 1–0 in the final. In 2016 Adelaide United won their first ever A-League Grand Final, beating the Western Sydney 3-1 with goals from Bruce Kamau, Isaías and Pablo Sanchez.