Port Chalmers is a suburb and the main port of the city of Dunedin, New Zealand, with a population of 3,000. Port Chalmers lies ten kilometres inside Otago Harbour, some 15 kilometres northeast from Dunedin's city centre.
Much of Port Chalmers is located on a small hilly peninsula, at the northern end of which is a large reclaimed area which is now the site of Dunedin's container port. Close to the southeastern shore of this peninsula are a pair of islands, which lie across the harbour between Port Chalmers and the Otago Peninsula. These two islands are Quarantine Island/Kamau Taurua and Goat Island. Prior to the local body reorganisation in the 1980s Port Chalmers was made up of several suburbs, as well as the central area, Roseneath, Blanket Bay, Upper Junction, Brick Hill, Sawyers Bay, Mussel Bay, Upper Port Chalmers, Dalkeith, Careys Bay, Reynoldstown, Deborah Bay, Hamilton Bay, Waipuna Bay, Te Ngaru, and Aramoana, as well as the outlying townships of Long Beach, Purakanui and several other smaller nearby villages and farmsteads.