The Vavau group measures about 21 km from east to west and 25 km from north to south. Vavau had 14,922 inhabitants at the 2001 census, of which 4,051 lives in the capital Neiafu. The islands in Vavaʻu District outside of Vavaʻu Group are uninhabited. The main island of ’Utu Vava’u is 97sqkm, the second largest island in Tonga.
Vavaʻu is a coral reef with superior oblique in the north up to 200m high cliffs. On the south side of the island group, it is dissolved into many small islands and waterways. The largest of these waterways, the fjord-like Ava Pulepulekai channel extends 11km inland from the harbor of Neiafu, the capital.
’Utu Vava’u island is a raised platform of coral cliffs on the north coast and a low and irregular coastline south that opens in a complex network of channels, bays and islands forming one of the best protected natural harbors in the Pacific.
’Utu Vava’u is also home to the ʻEneʻio Botanical Garden, Tonga's only botanical garden.