The 2018 South Australian National Football League (SANFL) grand final was played at the Adelaide Oval on Sunday, 23 September to determine the premiers for the 2018 SANFL season. The Grand Final was contested by Norwood and North Adelaide. North Adelaide won the grand final, defeating Norwood by 19 points, winning their first premiership since 1991. The Jack Oatey Medal for the best player on the ground was won by Norwood's Mitch Grigg - the first member of a losing grand final side to win the medal.