Benjamin Austin (born 16 July 1982) is an Australian sailor. He competed for Australia at the 2008 Summer Olympics.
Together with teammate Nathan Outteridge, Austin became the 2008 World Champion in the 49er boat by finishing in front of Britons Stevie Morrison and Ben Rhodes. In 2007 they won the bronze medal in the same event at the World Championships in Cascais, Portugal. He was an Australian Institute of Sport scholarship holder.