Introduction of the A-League
Left: the first A-League logo Right: the current A-League logo
The A-League was established in 2004 as a successor to the recently disbanded National Soccer League, with eight initial teams announced as the inaugural competitors of the competition - the majority of them being new clubs.
On 26 August 2005 the first ball was kicked in the Hyundai A-League, 16 months after the last ball was kicked in the NSL. Sydney FC was the inaugural Grand Final winner, with Adelaide United securing the first Premiership as table-toppers at the end of the season.
The initial season was made up of:
- Adelaide United (SA)
- Central Coast Mariners (NSW)
- Melbourne Victory (VIC)
- Newcastle Jets (NSW)
- New Zealand Knights (NZ)
- Queensland Roar (QLD - now Brisbane Roar)
- Perth Glory (WA)
- Sydney FC (NSW)
The launch of the A-League in 2005
The Knights took part in the first two seasons of the competition, before Wellington Phoenix took over their licence ahead of the 2007/08 season.
The league expanded in 2009 with two new teams - Gold Coast United (QLD) and North Queensland Fury (QLD) - with Melbourne Heart (now Melbourne City) joining in 2010. However, Gold Coast and North Queensland lasted three and two seasons respectively.
A second team in Sydney was announced in 2012, with Western Sydney Wanderers joining the competition for the 2012-13 season, winning the Premiership in their first season and the AFC Champions League in 2014.
In December 2018 the A-League - which had 10 clubs at the time - announced that two new clubs would be added to the competition across the next two seasons, with Western United (VIC) and Macarthur FC (NSW) joining in 2019/20 and 2020/21 respectively.
On 31 December 2020, the A-League officially became independent of Football Australia, coming under the new entity called the 'Australian Professional Leagues'.
Sydney FC is the most successful team in the history of the A-League, winning four Premierships and five Championships.
Sydney FC lift the A-League Championship trophy, nicknamed the 'Toilet Seat'.