Port Jackson is a harbour of Sydney, Australia.
Port Jackson may also refer to: Port Jackson, New Zealand, a small settlement on the Coromandel Peninsula's coast Port Jackson shark, a species of shark found in the coastal region of southern Australia, including the waters in the harbour of Sydney Port Jackson willow or Acacia saligna, a species of Acacia from Australia that has become an invasive weed in South Africa Ficus rubiginosa or "Port Jackson fig", of Australia