The Great Otway National Park is a national park located in the Barwon South West region of Victoria, Australia. The 103,185-hectare (254,980-acre) national park is situated approximately 162 kilometres (101 mi) southwest of Melbourne, in the Otway Ranges, a low coastal mountain range. It contains a diverse range of landscapes and vegetation types.

The Barwon South West is an economic rural region located in the southwestern part of Victoria, Australia. The Barwon South West region stretches from the tip of the Queenscliff Heads to the border of South Australia. It is home to Victoria’s largest provincial centre, Geelong and the major centres of Aireys Inlet, Apollo Bay, Camperdown, Colac, Hamilton, Lorne, Port Campbell, Port Fairy, Portland, Torquay and Warrnambool. It draws its name from the Barwon River and the geographic location of the region in the state of Victoria.