Davao Gulf is a gulf found in Mindanao in the Philippines. Davao Gulf cuts into the island of Mindanao from Celebes Sea. It is surrounded by all four provinces in the Davao Region. The largest island in the gulf is Samal Island. Davao City, on the gulf's west coast, is the largest and busiest port on the gulf. The bagobos, a tribe known in Davao, are living in the Davao Gulf. A gulf or bay is a part of a lake or ocean that extends so that it is surrounded by land on three sides. ... Map of the Philippines showing the island groups of Luzon, Visayas, and Mindanao. ... Celebes Sea on its northern border. ... Map of the Philippines showing all the regions and their provinces. ... Davao Region, designated as Region XI, is one of the regions of the Philippines, located on the southeastern portion of Mindanao. ... Davao City is one of the most important cities on the island of Mindanao, and is the largest city in the Philippines in area, and the largest city in the world. ...