The 2020–21 Adelaide United FC season is the club's 17th season since its establishment in 2003. The club will participate in the A-League for the 16th time. The club will not compete in the 2020 FFA Cup due to the event being cancelled following the COVID-19 pandemic in Australia.[1]
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Source: A-Leagues Rules for classification: 1) Points; 2) Goal difference; 3) Goals scored; 4) Least red cards; 5) Least yellow cards; 6) Toss of a coin in an event of a tie of two clubs. Notes:
^The top two teams entered the finals series at the semi-finals, while the teams ranked third to sixth entered the finals series at the elimination-finals.
^Karanikos-Mimis, Spiro (9 October 2020). "Djite: on Reds recruitment and keeping the faith". InDaily. It would've been great to keep Opseth but we don't have that financial flexibility unfortunately and he left prior to our deadline day deals.