The Clive Churchill Medal is the award given to the player judged to be man-of-the-match in the National Rugby League's annual Grand Final. The award was created to honour Clive Churchill, one of the greatest rugby league players in Australian history, following his death in 1985. A prestigious honour in the NRL, the medal's recipient is chosen by the selectors of the Australian national team and announced and awarded at the post-grand final ceremony.

The 2021 NRL Grand Final was the conclusive and premiership-deciding game of the 2021 National Rugby League season in Australia. It was contested between the Penrith Panthers and the South Sydney Rabbitohs on Sunday 3 October at Suncorp Stadium in Brisbane. Penrith won the match 14–12 to claim their third premiership title, and their first since 2003. Penrith co-captain and halfback Nathan Cleary was awarded the Clive Churchill Medal as the official man of the match.