Northern Samar, officially the Province of Northern Samar, is a province in the Philippines located in the Eastern Visayas region. Its capital is Catarman, the most populous town in the province and is located at the northern portion of the island of Samar. Bordering the province to the south are the provinces of Samar and Eastern Samar. To the northwest, across the San Bernardino Strait is Sorsogon; to the east is the Philippine Sea of the Pacific Ocean and to the west is Samar Sea.