D'Urville Island, Māori name Rangitoto ki te Tonga, is the largest island in the Marlborough Sounds, on the northern coast of the South Island of New Zealand. It was named after the French explorer Jules Dumont d'Urville. With an area of approximately 150 square kilometres (58 sq mi), it is the eighth-largest island of New Zealand, and has around 52 permanent residents. The local authority is the Marlborough District Council.

The Marlborough Sounds are an extensive network of sea-drowned valleys at the northern end of the South Island of New Zealand. The Marlborough Sounds were created by a combination of land subsidence and rising sea levels. According to Māori mythology, the sounds are the prows of the many sunken waka of Aoraki.