The 2019–20 season was the Central Coast Mariners's 15th season since its establishment in 2004. During the pre-season, Alen Stajcic signed a 3-year contract as the new coach. 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, and subsequently extended indefinitely. The season resumed on 17 July 2020.