1125 GMT April 16, 2021
Belichick, of the New England Patriots, said he was flattered when he was first offered the medal – the top award given to civilians in the US, BBC News reported.
But he said he changed his mind after a mob of Trump supporters stormed Congress last week. Five people died.
The celebrated coach had previously spoken of his friendship with Trump.
"Recently, I was offered the opportunity to receive the Presidential Medal of Freedom, which I was flattered by out of respect for what the honor represents and admiration for prior recipients," Belichick said in a statement.
"Subsequently, the tragic events of last week occurred and the decision has been made not to move forward with the award."
Belichick, who has won a record six Super Bowl titles, is considered one of the most successful coaches in NFL history.
The Presidential Medal of Freedom recognizes individuals who have made outstanding contributions to "the security or national interests of America."
In 2019 Trump gave the award to golfer Tiger Woods.