Justin Plapp (born 22 June 1977) is a former Australian rules footballer who played for the Richmond Football Club and St Kilda Football Club in the Australian Football League (AFL). Justin was born in Penguin, Tasmania and attended Penguin High School. In the 1999 AFL draft, Plapp was traded to St Kilda for pick 39, Scott Homewood. He was used at St Kilda as a half back flanker in his three seasons. He was appointed captain-coach of the Burnie Dockers in 2008 and continued on into the first season of the revamped Tasmanian State League competition in 2009.