Pago Bay is the largest bay on the U.S. territory of Guam. It is situated on the island's eastern coast at the mouth of the Pago River.
The area has a long history of human habitation, with evidence of CHamoru settlement dating back to before Spanish colonization in the late seventeenth century. During the Spanish-Chamorro Wars, the Spanish relocated populations from Tinian and Aguigan to the village of Pago. However, following a smallpox epidemic in 1856 that killed much of the local population, the Spanish moved survivors to other villages, leaving the bay shoreline largely uninhabited for a period.
In modern times, Pago Bay is a popular destination for recreationalists and fishermen. It also saw significant new housing development during the 2000s.