Ōtāhuhu is a suburb located in the Auckland region of New Zealand. It is situated approximately 13 kilometres southeast of the Auckland central business district (CBD). The area sits on a narrow isthmus positioned between an arm of the Manukau Harbour to the west and the Tāmaki River estuary to the east.
The suburb is located on the Auckland isthmus, which serves as the narrowest connection between the North Auckland Peninsula and the rest of the North Island. At its narrowest point, this land bridge is only about 1,200 metres wide between the Ōtāhuhu Creek and the Māngere Inlet. Historically recognized as the southernmost suburb of the former Auckland City, Ōtāhuhu is currently considered part of South Auckland.