This is a list of player transfers involving RFU Championship teams before or during the 2021–22 season.
The list is of deals that are confirmed and are either from or to a rugby union team in the Championship during the 2020–21 season.
It is not unknown for confirmed deals to be cancelled at a later date.
On 20 June, Saracens were promoted to Premiership Rugby for the 2021–22 season after defeating Ealing Trailfinders in the promotion playoff.
Due to the COVID-19 pandemic there was also no National League 1 in 2020–21, so no sides are relegated/promoted to or from the division.