Wonthaggi is a seaside town located 132 kilometres (82 mi) south east of Melbourne via the South Gippsland and Bass highways, in the Bass Coast Shire of Gippsland, Victoria, Australia. Known originally for its coal mining, it is now the largest town in South Gippsland, a regional area with extensive tourism, beef and dairy industries.

The Bass Highway is an 87 kilometre highway in Victoria, Australia, branching off the South Gippsland Highway at the township of Lang Lang and running south, along the eastern shore of Western Port, to Anderson. The Bass Highway continues easterly to Kilcunda, Wonthaggi and Inverloch, then turns north-easterly to rejoin the South Gippsland Highway at Leongatha. It was named due to its proximity to the Bass Strait.