2021–22 1. FC Union Berlin season

The 2021–22 season was 1. FC Union Berlin's 57th season in existence and the club's 3rd consecutive season in the Bundesliga, the top tier of German football. The club participated in the DFB-Pokal and the UEFA Europa Conference League.

Background
After finishing the 2019–20 season, their first in the Bundesliga, in 11th-place, Union started the 2020–21 season strongly and were in fifth-place and one point behind third-place after 16 matches. Union picked up just seven points from their next 8 matches before a return to fitness for Max Kruse saw an upturn in the club's form as they secured a seventh-placed finish and qualification to the 2021–22 UEFA Europa Conference League after Kruse scored a stoppage time winner in a final day victory over RB Leipzig.

Matches
The league fixtures were announced on 25 June.

Appearances and goals
! colspan=14 style=background:#dcdcdc; text-align:center| Goalkeepers

! colspan=14 style=background:#dcdcdc; text-align:center| Defenders

! colspan=14 style=background:#dcdcdc; text-align:center| Midfielders

! colspan=14 style=background:#dcdcdc; text-align:center| Forwards

! colspan=14 style=background:#dcdcdc; text-align:center| Players transferred out during the season