a town of the province of Samar, Philippine Islands, on the W. coast at the mouth of the Calbayog river, about 30 m. N.W. of Catbalogan, the capital, in lat. 12° 3' N. Pop. (1903) 15,895. Calbayog has an important export trade in hemp, which is shipped to Manila. Copra is also produced in considerable quantity, and there is fine timber in the vicinity. There are hot springs near the town. The neighbouring valleys of the Gandara and Hippatan rivers are exceedingly fertile, but in 1908 were uncultivated. The climate is very warm, but healthy. The language is Visayan.