Sarangani, officially the Province of Sarangani, is a province in the Philippines located in the Soccsksargen region. Its capital is Alabel while Glan is the most populous municipality in the province. With a 230-kilometer coastline along the Sarangani Bay and Celebes Sea, the province is at the southernmost tip of Mindanao island, and borders …Sarangani, officially the Province of Sarangani, is a province in the Philippines located in the Soccsksargen region. Its capital is Alabel while Glan is the most populous municipality in the province. With a 230-kilometer coastline along the Sarangani Bay and Celebes Sea, the province is at the southernmost tip of Mindanao island, and borders South Cotabato and Davao del Sur to the north, Davao Occidental to the east, and the Celebes Sea to the south.