Revenue District Office No. 15 - Ilagan, Isabela
Office Address: BIR Building, Barangay Magsaysay, Naguilian , Isabela
Assistant Revenue District Officer:e-mail:
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Area of Jurisdiction:
Comprised of 37 Municipalities, namely: Alicia, Angadanan, Aurora, Benito Soliven, Burgos, Cabagan, Cabatuan, Cauayan, Cordon, Dinapiqui, Divilican, Echague, Gamu, Ilagan, Jones, Luna, Maconocon, Magsaysay, Mallig, Naguilian, Palana, Quezon, Quirino, Ramon, Reina Mercedes, Roxas, San Agustin, San Guillermo, San Isidro, San Manuel, San Mariano, San Mateo, San Pablo, Santa Maria, Santiago, Santo Tomas, Tamauini.