New Georgia, with an area of 2,037 km2 (786 sq mi), is the largest of the islands in Western Province, Solomon Islands, and the 224th-largest island in the world.
New Georgia island is located in the New Georgia Group, an archipelago including most of the other larger islands in the province. The island measures approximately 85 kilometres (53 mi) long by 41 kilometres (25 mi) wide. New Georgia forms part of the southern boundary of the New Georgia Sound. Kolombangara lies across the Kula Gulf to the west, Choiseul to the northeast, Vangunu is to the southeast, and Rendova to the southwest, across the Blanche Channel.
New Georgia is a volcanic island, surrounded in some places by a coral reef. The highest point is Mount Masse, with an elevation of 860 metres (2,820 ft).