John Grantley Cooper (lair 14 Mèi 1954) ya iku juru catur Welsh International Master (IM) (1984), sepuluh-kaping Welsh Catur Championship juara (1976, 1977, 1978, 1984, 1985, 1992, 1993, 1994, 1995, 1996), kaping pindho Chess Olympiad individu medali perak juara (1976
, 1984).