Steven Joseph Lopes (Portuguese pronunciation: [ˈlɔpɨʃ]) (born April 22, 1975) is an American Catholic prelate.

During that time, he served as a personal aide to William Cardinal Levada, who was prefect for the Congregation of the Doctrine of the Faith from 2005 to 2012.

[6] Starting in 2012, Lopes served as the secretary of the Vatican commission Anglicanae Traditiones, which was formed with the goal of developing a missal that would blend Anglican and Roman Rite liturgical elements for the use of the personal ordinariates.

[2][10] On November 24, 2015, the Holy See announced that Pope Francis had appointed Lopes as the first bishop of the Personal Ordinariate of the Chair of Saint Peter, a church structure for Catholics in the US and Canada who were mostly formerly Anglicans.

[2][5][9] This announcement coincided with the first Sunday on which the ordinariates began celebrating Mass using Divine Worship: The Missal, developed while Lopes was serving on the Anglicanae Traditiones commission in Rome.