The Territorial Prelature of Isabela (de Basilan) (Latin: Praelatura Territorialis Isabellapolitanus) is a Roman Catholic territorial prelature located in the province of Basilan, and its component cities of Isabela City and Lamitan City, in the Ecclesiastical province of Zamboanga in the Philippines.
October 12, 1963: Established as Territorial Prelature of Isabela from the Metropolitan Archdiocese of Zamboanga1— Sta. Isabel Cathedral Parish (Founded 1850)Isabela City, 7300 Basilan Province Tel. (062) 200-7606
Population: 87,000; Catholics: 30,900Titular: St. Elizabeth of Portugal (Patroness of Basilan)Parish Priest: Bishop Martin S. JumoadParochial Vicars: Fr. Edgardo Rivero, Fr. Noelito SalandronResident Priest: Fr. Joselito delos Reyes2—St. Peter the Apostle Parish (Founded 1886)Lamitan City, 7302 Basilan Province
Population: 85,000; Catholics: 25,900Titular: St. Peter the ApostleParish Priest: Fr. Valeriano Cabalog, Jr.Parochial Vicar: Fr. Tomas Lim3—St. Anthony Parish (Founded 1956)Sta. Clara, Lamitan City, 7302 Basilan Province
Population: 14,500; Catholics: 5,000Titular: St. Anthony of PaduaParish Priest: Fr. Cirilo Nacorda4—Immaculate Heart of Mary Parish (Founded 1962)Maluso, 7303 Basilan Province
Population: 30,000; Catholics: 2,200Titular: Immaculate Heart of MaryParish Priest: Fr. Leo Dalmao, CMFParochial Vicar: Fr. Eduardo Apongan, CMF5—St. Vincent Ferrer Parish (Founded 1969)Tumahubong, Sumisip, 7304 Basilan Province
Population: 48,000; Catholics: 3,000Titular: San Vicente FerrerParish Priest: Fr. Paulino Manila, CMF6—Holy Rosary Parish (Founded 1984)Begang, Isabela City, 7300 Basilan Province
Population: 6,000; Catholics: 3,500Titular: Our Lady of the Holy RosaryParish Priest: Fr. Rodel Angeles7—St. Vincent Ferrer Parish (Founded 1987)Matarling, Lantawan, 7301 Basilan Province
Titular: San Vicente FerrerParish Priest: Fr. Juan Quiño, Jr.8—Sagrado Corazon de Jesus Parish (Founded 1995)Look, Lamitan City, 7302 Basilan Province
Population (not available)Titular: Sagrado Corazon de JesusParish Priest: Fr. Rolando Marikit, OFMParochial Vicar: Fr. Andrew Litigio, OFMPrelates of Isabela (Roman rite)Bishop Martin Sarmiento Jumoad (November 21, 2001 – present)Bishop Romulo Tolentino de la Cruz (January 28, 1989 – January 8, 2001)Bishop José María Querejeta Mendizábal, C.M.F. (October 24, 1963 – January 28, 1989) 
