Sydney Football Club is an Australian professional soccer club based in Sydney, New South Wales. It competes in the country's premier men's competition, A-League Men, under licence from Australian Professional Leagues (APL). The club was founded in 2004 and entered the A-League as one of the eight original teams for the inaugural 2005–06 season.
Sydney FC is the most successful professional soccer club in Australia. The Sky Blues have won five A-League Men Championships, four A-League Men Premierships, two Australia Cup titles and one OFC Champions League title. The club has also appeared in the AFC Champions League on seven occasions, making the Round of 16 in 2016. The club experienced its most successful period from 2016 to 2020, when Graham Arnold and Steve Corica led the club to a combined three Championships and three Premierships, as well as an Australia Cup.
Before the 2018–19 season, the club's home ground was Allianz Stadium in Moore Park. When the NSW Government announced that the stadium would be redeveloped in the lead up to the 2019 New South Wales state election, Sydney FC played its home matches at the neighbouring Sydney Cricket Ground, along with the suburban Jubilee Oval and Leichhardt Oval grounds. In October 2022, the club returned to the newly built Allianz Stadium in Moore Park. The clubs training and administration facility in North Ryde, known as Sky Park, was completed in 2023.
As the only A-League team in the city for the first seven years of its existence, the club's fans hail from all across the Sydney Metropolitan Area. Sydney's main supporter group is known as 'The Cove', named after the original title given to the colonial settlement of Sydney, Sydney Cove. Sydney FC is the most supported A-League club in Australia, with 693,000 fans as of 2023.
The club has rivalries with Melbourne Victory, known as The Big Blue, and the Western Sydney Wanderers, named the Sydney Derby. Alex Brosque is the club's all time top goal scorer, having scored 83 goals. Rhyan Grant has the most appearances for the club, having played 342 games.