Portarlington is a historic coastal township located on the Bellarine Peninsula, 28 km from the city of Geelong, in the state of Victoria, Australia. It has a diverse population which includes a wide range of ethnic backgrounds, a high proportion of retirees, and a large seasonal holiday influx. The gently rising hills behind the town feature vineyards and olive groves, and offer spectacular panoramic views across Port Phillip Bay. Portarlington is a popular family holiday destination and a centre of fishing and aquaculture (mussels). At one time the town claimed the largest Caravan Park in the Southern Hemisphere, although the size has reduced considerably in recent decades. With direct ferry links to the city of Melbourne Portarlington also serves as a gateway to the historic towns and surf beaches of the Bellarine Peninsula.

The Bellarine Peninsula is a peninsula located south-west of Melbourne in Victoria, Australia, surrounded by Port Phillip, Corio Bay and Bass Strait. The peninsula, together with the Mornington Peninsula, separates Port Phillip Bay from Bass Strait. The peninsula itself was originally occupied by Indigenous Australian clans of the Wadawurrung nation, prior to European settlement in the early 19th century. Early European settlements were initially centred on wheat and grain agriculture, before the area became a popular tourist destination with most visitors arriving by paddle steamer on Port Phillip in the late 19th century.