Castor Bay

Castor Bay
Castor Bay from the air
Interactive map of Castor Bay
Coordinates: 36°45′43″S 174°45′58″E / 36.762°S 174.766°E / -36.762; 174.766
CountryNew Zealand
CityAuckland
Local authorityAuckland Council
Electoral wardNorth Shore ward
Local boardDevonport-Takapuna Local Board
Area
 • Land144 ha (360 acres)
Population
 (June 2025)
 • Total
4,760
 • Density3,310/km2 (8,560/sq mi)
Postcode
0620
Sunnynook Campbells Bay (Hauraki Gulf)
Forrest Hill
Castor Bay
(Hauraki Gulf)
Forrest Hill Milford (Hauraki Gulf)

Castor Bay is a bay and suburb of the North Shore, located in Auckland which is in the North Island of New Zealand. Located between Milford and Campbells Bay, it is part of the East Coast Bays. To the east lies the islands of Rangitoto and Motutapu, which are easily visible from land. The suburb is in the North Shore ward, one of the thirteen administrative divisions of Auckland Council.

The bay itself is quite small and is well sheltered by an artificial breakwater that extends from the northern edge of the bay, running towards the south. A small bark and grass area with several large pōhutukawa trees offering shelter complements the beachfront and an extended coastline stretches out to the north towards Campbells Bay.