IRIGA, a municipality (with 13 barrios or districts) of the province of Camarines Sur, Philippine islands, on the Bikol river, about 20 m. S.E. of Naga, the provincial capital, and near the south-west base of Mt. Iriga, a volcanic peak reaching a height of about 4,00o ft. above sea-level. It is on the railway running south from Manila through Naga. Pop. (1918), 24,145, of whom 11,955 were males and 18 whites. The soil in its vicinity is rich, produc ing rice, corn, sugar, pepper, cacao, cotton, aback tobacco and copra. Various valuable hardwoods are found in the nearby
regions. In 1918, it had I 1 manufacturing establishments with output valued at 100,00o pesos; three rice mills with output val ued at 162,600 pesos ; and 718 household industry establishments with output valued at 128,800 pesos. Eleven of the 12 schools were public. The language spoken is Bikol.