The Diocese of Balanga is one of the 72 dioceses of the Catholic Church in the Philippines. It was established on March 17, 1975 by Pope Paul VI. The diocese comprises the whole civil province of Bataan, with 37 parishes, one minor basilica, chaplaincy, quasi-parish and chapel, and 4 vicariates. It has 11 schools as of 2017, with 10 are operated by the diocese's Diocesan Schools of Bataan (DSOB). The Diocesan Shrine and Cathedral-Parish of St. Joseph, Husband of Mary in Aguire Street, Poblacion, Balanga City, serves as the seat of the diocese. It is the suffragan of the Roman Catholic Archdiocese of San Fernando in Pampanga.