The 2021 TCR Australia Series (known for sponsorship reasons as the 2021 Supercheap Auto TCR Australia Series[1]) was an Australian motor racing competition for TCR Touring Cars. It was the second TCR Australia Touring Car Series.[2] The series was sanctioned by Motorsport Australia as a National Series with the Australian Racing Group Pty Ltd appointed as the Category Manager.[1] It was contested as part of the renamed Motorsport Australia Championships series.
The series was won by Chaz Mostert driving an Audi RS 3 LMS TCR.