チャモロ語
Umatac (), formerly called Umata, is a village on the southwestern coast of the United States territory of Guam. The month of March in the Chamorro language is "Umatalaf," or "to catch guatafi," which is believed to be the root word of Umatac. The village's population has decreased since the island's 2000 census, and it is by far the least populated village on the island.