Michael Anthony Fleming, O.S.F. was an Irish-born Friar Minor who served as the Roman Catholic Church bishop of the Diocese of St. John's, Newfoundland. He was principally responsible for changing a small mission with several priests in four parishes into a large diocese with over 40,000 congregants and was the single most influential Irish immigrant to come to the Colony of Newfoundland in the 19th century. He was the principal creator of the Roman Catholic Cathedral of St. John the Baptist in St. John's.

The Archdiocese of St. John's, Newfoundland is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in St. John's, Newfoundland and Labrador, Canada. It is the metropolitan of an ecclesiastical province with two suffragan dioceses: Grand Falls and Corner Brook and Labrador. The current archbishop is the Most Reverend Peter Hundt. The Archdiocese of St. John's is the oldest Roman Catholic ecclesiastical jurisdiction in English-speaking North America.