The 2019–20 season was GNK Dinamo Zagreb's 29th season in the Croatian First Division and 107th year in existence as a football club.

In addition to the domestic league, Dinamo Zagreb participated in this season's editions of the Croatian Cup, the Croatian Super Cup, and the UEFA Champions League.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.