(According to Australia Post)

Port Adelaide
Port Albany
Port Albert
Port Alma
Port Arthur (SA)
Port Arthur (TAS)
Port Augusta
Port Augusta North
Port Augusta West
Port Bonython
Port Botany
Port Broughton
Port Campbell
Port Clinton
Port Curtis
Port Davis
Port Denison
Port Douglas
Port Elliot
Port Fairy
Port Flinders
Port Franklin
Port Gawler
Port Germein
Port Gibbon
Port Giles
Port Hacking
Port Hedland
Port Hughes
Port Huon
Port Julia
Port Kembla
Port Kennedy
Port Kenny
Port Latta
Port Lincoln
Port MacDonnell
Port Macquarie
Port Mannum
Port Melbourne
Port Moorowie
Port Neil
Port Noarlunga
Port Noarlunga South
Port of Brisbane
Port Paterson
Port Pirie
Port Pirie South
Port Pirie West
Port Rickaby
Port Sorell
Port Stanvac
Port Victoria
Port Vincent
Port Wakefield
Port Welshpool
Port Willunga
Port Wine
Portarlington
Porter Lagoon
Porters Creek
Porters Retreat
Portland (NSW)
Portland (VIC)
Portland North
Portland Roads
Portland West
Portsea
Portsmith