Rosebank is a peninsula and industrial suburb of Auckland, New Zealand. It is the westernmost point of the Auckland isthmus. The peninsula runs from the southeast in a northerly direction, with the Whau River on its west. Pollen Island and Traherne Island lie nearby in the Waitematā Harbour to the north-eastern side of the peninsula. Traherne Island is connected to the peninsula by a causeway that is part of the Northwestern Motorway.

The Whau River is an estuarial arm of the southwestern Waitemata Harbour within the Auckland metropolitan area in New Zealand. It flows north for 5.7 kilometres (3.5 mi) from its origin at the confluence of the Avondale Stream and Whau Stream to its mouth between the Te Atatū Peninsula and the long, thin Rosebank Peninsula in Avondale. It is 800 metres (2,600 ft) at its widest and 400 metres (1,300 ft) wide at its mouth.