Simon Patrick Mackin (born 1 September 1992) is an Australian cricketer who debuted for Western Australia during the 2013–14 season. Mackin was born in Wyalkatchem, a small country town in the Wheatbelt region of Western Australia, and raised nearby in Tammin. A right-arm fast bowler who stands 2.02 metres (6 ft 8 in) tall, he made his debut for the state under-23 side in 2010, aged 18, after previous appearances for state under-15, under-17, and under-19 teams. At the conclusion of the 2012–13 season, following good form for Willetton at grade level, Mackin was named the WA Cricket Media Guild's Player of the Future. He subsequently received a rookie contract from the Western Australian Cricket Association (WACA) for the 2013–14 season.