Ilagan City is a first-class city and the capital of the province of Isabela, Philippines. The city consists of 91 barangays with the following names, Barangay: Aggasian, Alibagu, Alinguigan 1st, Alinguigan 2nd, Alinguigan 3rd, Arusip, Baculud, Bagong Silang, Bagumbayan, Baligatan, Ballacong, Bangag, Batong-Labang, Bigao, Cabannungan 1st, Cabannungan 2nd, Cabeseria 2, Cabeseria 3, Cabeseria 4, Cabeseria 5, Cabeseria 6, Cabeseria 7, Cabeseria 8, Cabeseria 9, Cabeseria 10, Cabeseria 11, Cabeseria 12, Cabeseria 13, Cabeseria 14, Cabeseria 15, Cabeseria 16, Cabeseria 17, Cabeseria 18, Cabeseria 19, Cabeseria 20, Cabeseria 21, Cabeseria 22, Cabeseria 23, Cabeseria 24, Cabeseria 25, Cabeseria 26, Cabeseria 27, Cadu, Calamagui 1st, Calamagui 2nd, Carikkikan Norte, Carikkikan Sur, Camunatan, Capellan, Capo, Centro-San Antonio, Centro Poblacion, Fugu, Fuyo, Gayong-gayong Norte, Gayong-gayong Sur, Guinatan, Imelda Bliss Village, Lullutan, Malalam, Malasin, Manaring, Mangcuram, Marana 1st, Marana 2nd, Marana 3rd, Minabang, Morado, Naguilian Norte, Naguilian Sur, Namnama, Nanaguan, Osmeña, Paliueg, Pasa, Pilar, Quimalabasa, Rang-ayan, Rugao, Salindingan, San Andres, San Felipe, San Ignacio, San Isidro, San Juan, San Lorenzo, San Pablo, San Rodrigo, San Vicente, Santa Barbara, Santa Catalina, Santa Isabel Norte, Santa Isabel Sur, Santa Victoria, Santo Tomas, Siffu, Sindon Bayabo, Sindon Maride, Sipay, Tangcul and Baranagay Villa Imelda.