Bua () is one of fourteen provinces of Fiji. Located in the west of the northern island of Vanua Levu, it is one of three northern provinces, and has a land area of 1,379 square kilometers within the three main districts of Bua, Vuya and Wainunu.
Bua also is one of the port of entries into Vanua Levu. This port is located in Nabouwalu that is equipped with a jetty where ships berth. Fiji government is soon planning to declare Nabouwalu a township.
Its population at the 2017 census was 15,489, making it the fifth least-populous Province.
Bua is governed by a Provincial Council, chaired by Ratu Filimone Ralogaivau.