Whanganui Island is the largest of a small group of islands at the entrance to Coromandel harbour in the Hauraki Gulf, off the coast of New Zealand's North Island.

Coromandel, also called Coromandel Town to distinguish it from the wider district, is a town on the Coromandel Harbour, on the western side of the Coromandel Peninsula, which is in the North Island of New Zealand. It is 75 kilometres east of the city of Auckland, although the road between them, which winds around the Firth of Thames and Hauraki Gulf coasts, is 190 km long. The population was 1,930 as of June 2023.