Patrick Grappin (or Grapin; born 22 October 1955) is a French former professional football player and manager.

Grappin played for Roubaix, RC France, Rennes, and Malakoff in his early career. He participated in one game with Paris Saint-Germain during the 1979–80 season, a 2–1 Division 1 loss to Nancy on 22 September 1979. Her went on to play 9 years with Poissy after leaving PSG.^{[citation needed]}

Grappin took charge as manager of Poissy in 1989 after retiring from football.^{[citation needed]} He would later take the position of sporting director at the club in 1993, and left in 1998.^{[citation needed]}