Pambujan, officially the Municipality of Pambujan, is a municipality in the province of Northern Samar, Philippines. According to the 2020 census, it has a population of 35,532 people. Pambujan has a contiguous territory of 16,390 hectares, which extends into the hinterlands of Northern Samar across a number of rivers, lakes, brooks and mountains. The most notable of these physical features is Mount Cagbigajo, which once served as an observation and listening post of the Allied Intelligence Bureau Operative during World War II.