Cagwait, officially the Municipality of Cagwait (Surigaonon: Lungsod nan Cagwait; Tagalog: Bayan ng Cagwait), is a municipality in the province of Surigao del Sur, Philippines. According to the 2020 census, it has a population of 21,747 people.

Cagwait was spelled "Cacuait" or "Caguait" during the Spanish and American colonial period.

Cagwait is politically subdivided into 11 barangays.

Cagwait is about 32 kilometres (20 mi) southeast of Tandag, the capital town of Surigao del Sur. It is bounded by the towns of Bayabas on the north, Marihatag on the south, the Diwata mountains on the west and the Pacific Ocean in the east. It has a total land area of 21,410 hectares (52,900 acres).

Cagwait is politically subdivided into 11 barangays. Each barangay consists of puroks while some have sitios.

Cagwait has a tropical rainforest climate (Af) with heavy to very heavy rainfall year-round and with extremely heavy rainfall in January.

Poverty incidence of Cagwait

Cagwait has an all-weather port at Barangay Bitaugan West (named Aras-asan Port by the Philippine Ports Authority) secured by the natural protection of Arangasa Islands. It has also an abandoned aerodrome made and used by the private planes of Aras-asan Timber Company, Inc. (ARTIMCO) during its peak of timber operation in the late 1970s.