Catarman is a first class municipality and the capital of
Northern Samar,
Philippines. It is the largest town in terms of land area and population in the province. According to the 2010 census, it has a population of 84,833, making it the most populous municipality in
Eastern Visayas. It is the commercial, educational, financial, political and government center of the province. It lies on the northern part of
Samar Island, bounded to the east by
Mondragon, to the west by
Bobon, to the south by
Lope de Vega, and to the north by the
Philippine Sea.