The 2021 Atlantic 10 men's basketball tournament (A-10) was the postseason men's basketball tournament for the Atlantic 10 Conference's 2020–21 season. It was originally scheduled to be held from March 10 through March 14, 2021, at the Barclays Center in Brooklyn, New York. Due to COVID-19 regulations, the tournament was moved to Richmond, Virginia and was set to be played entirely at the Robins Center and Siegel Center, respectively homes of A-10 members Richmond and VCU.