2020–21 Adelaide United FC season

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.

Overview
{|class="wikitable" style="text-align:left" !rowspan=2 style="width:140px;"|Competition !colspan=8|Record !style="width:30px;"|P !style="width:30px;"|W !style="width:30px;"|D !style="width:30px;"|L !style="width:30px;"|GF !style="width:30px;"|GA !style="width:30px;"|GD !style="width:50px;"|Win %
 * A-League
 * A-League


 * A-League Finals
 * A-League Finals

!Total

Matches
On 24 November 2020, the A-League fixtures for the season were announced. Due to having 26 rounds in a 12 team league, Adelaide will play against Melbourne Victory, Perth Glory, Sydney FC and Western Sydney Wanderers three times.

Appearances and goals
Players with no appearances not included in the list.