The Diocese of Tui-Vigo is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Northwestern Spain. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Santiago de Compostela.

Diego de Arce y Reinoso Ávila y Palomares was a Spanish bishop who served as Grand Inquisitor of Spain from 1643 to 1665; and as Bishop of Plasencia (1640–1652), Bishop of Ávila (1637–1640), and Bishop of Tui (1635–1637).