The 2019–20 Western Sydney Wanderers FC season was the club's eighth season since its foundation in 2012.

The club participated in the A-League for the eighth time, and the FFA Cup for the sixth time.

On 24 March 2020, the FFA announced that the 2019–20 A-League season would be postponed until further notice due to the COVID-19 pandemic in Australia and New Zealand,[1] and subsequently extended indefinitely.

[2] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.