The 2021 season was Djurgårdens IF's 121st in existence, their 66th season in Allsvenskan and their 21st consecutive season in the league. In addition to the Allsvenskan, they competed in the 2020-21 and 2021–22 editions of the Svenska Cupen.
Source: svenskfotboll.se(in Swedish) Rules for classification: 1) Points; 2) Goal difference; 3) Goals scored; 4) Head-to-head points; 5) Head-to-head goal difference; 6) Head-to-head away goals scored; 7) Play-off (Note: Play-off is only played if need to decide champion, teams for relegation or UEFA competition and will be played on a neutral ground). (C) Champions
Updated to match(es) played on 6 March 2021. Source: Swedish Football Association Rules for classification: 1) Points; 2) Goal difference; 3) Goals scored; 4) Head-to-head record; 5) Highest ranked team