Agat (Chamorro: Hagat) is a village in the United States territory of Guam. It is located south of Apra Harbor on the island's western shore. The village's population has decreased since the island's 2000 census.
The village is 10 miles (16 km) southwest of Hagåtña, with most of the residents ethnic Chamorros, the indigenous people of Guam. Some of Agat's most notable sites are Mount Alifan, the Agat Marina, the Spanish Bridge, and War In The Pacific National Historical Park.