The 2020 St. George Illawarra Dragons season was the 22nd in the joint venture club's history.
The Dragons' men's team competed in the NRL's 2020 Telstra Premiership season.
On 13 August, Paul McGregor departed as the head coach of the men's team.
Notes a^ Matches in rounds two, three and four were played behind closed doors due to the COVID-19 pandemic.
[49] b^ Adam Gee was substituted after half time as referee in the round 18 game for Matt Cecchin after receiving a calf injury during the game.