Vahanga is a small uninhabited atoll part of the Acteon Group in the Tuamotu archipelago, French Polynesia and belongs to the municipality of the Gambier Islands.

The Tuamotu Archipelago or the Tuamotu Islands are a French Polynesian chain of just under 80 islands and atolls in the southern Pacific Ocean. They constitute the largest chain of atolls in the world, extending over an area roughly the size of Western Europe. Their combined land area is 850 square kilometres. This archipelago's major islands are Anaa, Fakarava, Hao and Makemo.