Motusa is a group of close villages in the district of Itu'tiu, on the island of Rotuma, one of the islands of Fiji. Rotuma is made up of two volcanic landmasses connected by a sandy isthmus, on which Motusa is located.
Motusa consists of the following villages:
Motusa is about one kilometer southwest of Ahau, the government station, which is also the location of the island's post office, and a small hospital. Ahau is now the administrative center of Rotuma, although for a long time Motusa, being the largest settlement, and one of the best moorings, was the centre of most business transactions and industry.