Cagwait is a fourth class municipality in the province of Surigao del Sur, Philippines. According to the 2010 census, it has a population of 18,899 people.

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 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 aerodome made and used by the private planes of Aras-asan Timber Company, Inc. (ARTIMCO) during its peak of timber operation in the late 1970s.

Barangay Poblacion is the seat of governance, while the center of trade of the municipality is in Barangay Aras-asan. It houses three rural banks, two pawnshops, three bakeshops, a radio station, a public terminal and public market. Telecommunication is on par with other neighboring municipalities using cell phones, and Internet via GPRS, and cable television are available. There are also good tourist inns, beach resorts and homestay (bread and breakfast). Motorized tricycles, jeepneys, and buses ply its roads and concrete highways.

Cagwait was the home of the now defunct company ARTIMCO, Inc., one of the largest suppliers of timber in the country. Its land holdings became a sanctuary of the Philippine Eagle, which was discovered by Charles Lindbergh during his wildlife expedition. He discovered the beautiful white-sand beach cove of Cagwait which he described as similar to Waikiki Beach in Hawaii.