List of Western Sydney Wanderers FC seasons

Western Sydney Wanderers Football Club is an Australian professional association football club based in Rooty Hill, New South Wales; the club was formed in 2012. They became the fourth team based in New South Wales, and the second team based in Sydney to compete in the A-League Men.

As of the end of the 2021-22 season, the club have participated in ten seasons in the top division of Australian soccer - the A-League. The club finished their inaugural season in 1st place, winning the Premiership and are the only Australian team to win the AFC Champions League, doing so in 2014. The club has also qualified for the A-League Grand Final in 2013, 2014 and 2016, losing all 3.

Key
Key to league competitions:
 * A-League – Australia's top soccer league, established in 2005.
 * Finals – The annual postseason elimination tournament for the A-League.
 * Australia Cup – Australia's national football knockout cup, established in 2014. Formerly knows as the FFA Cup until the 2021 season.
 * AFC Champions League (ACL) – The most prestigious club competition in Asian football; introduced in 1967 as the Asian Champion Club Tournament,
 * FIFA Club World Cup (CWC) – A knockout tournament, organised by FIFA encompassing the winners of the respective club competitions in the AFC, CAF, CONCACAF, CONMEBOL, OFC, UEFA along with the host nation.

Key to colours and symbols:

Key to league record:
 * Season = The year and article of the season
 * League = League name
 * P = Games played
 * W = Games won
 * D = Games drawn
 * L = Games lost
 * GF = Goals scored
 * GA = Goals against
 * Pts = Points
 * Pos = Final position

Key to cup record:
 * Dash (-) = Did not qualify
 * QR1 = First qualification round
 * QR2 = Second qualification round, etc.
 * Group = Group stage
 * R1 = First round
 * R2 = Second round, etc.
 * R32 = Round of 32
 * R16 = Round of 16
 * QF = Quarter-finals
 * SF = Semi-finals
 * RU = Runners-up
 * W = Winners