Balayan, a town and port of entry of the province of Batangas, Luzon, Philippine Islands, at the head of the Gulf of Balayan, about 55 m. S. by W. of Manila. Pop. (1903) 8493. Subsequently in October 1903, Calatagan (pop. 2654) and Tuy (pop. 2430) were annexed. Balayan has a healthful climate, and is in the midst of a fertile district (with a volcanic soil), which produces rice, cane-sugar, cacao, coffee, pepper, cotton, Indian corn, fruit (oranges, bananas, mangoes, etc.) and native dyes. Horses and cattle are raised for market in considerable numbers. The fisheries are important. The native language is Tagalog.