Native name: Aua | |
|---|---|
 A view from Ōtamahua / Quail Island at low tide, with the small King Billy Island seen in front of the wooded Moepuku Point | |
 | |
| Geography | |
| Location | Lyttelton Harbour / Whakaraupō |
| Coordinates | 43°38′06″S 172°41′09″E / 43.6350°S 172.6857°E |
| Area | 3,642 m2 (39,200 sq ft) |
| Length | 122 m (400 ft) |
| Width | 72 m (236 ft) |
| Administration | |
New Zealand | |
| Region | Canterbury |
King Billy Island (Māori: Aua; officially Aua / King Billy Island) is a small island and Scenic Reserve in Lyttelton Harbour / Whakaraupō on Banks Peninsula, New Zealand.