Patrick Aloysius O'Boyle (July 18, 1896 – August 10, 1987) was an American Catholic prelate who served as the first resident Archbishop of Washington from 1948 to 1973.

[2] O'Boyle graduated from St. Thomas' as valedictorian in 1916, and then began his studies for the priesthood at St. Joseph's Seminary in Yonkers, New York.

After his ordination, the archdiocese assigned O'Boyle as a curate at St. Columba's Church in the Chelsea section of Manhattan.

[6][1] Sheila Wickouski identifies social concerns, labor rights, and racial equality as having been O'Boyle's key issues.

[1] According to Raymond Kupke, O'Boyle's work at War Relief Services and his ability in dealing with governmental and non-governmental agencies during the war and postwar periods caught the attention of the apostolic delegate to the United States, Archbishop Amleto Giovanni Cicognani.

O'Boyle received his episcopal consecration on January 14, 1948, from Cardinal Francis Spellman, with Bishops John McNamara and Henry Klonowski serving as co-consecrators, in St. Patrick's Cathedral in New York City.

[7] Known for his opposition to racism,[9] O'Boyle in 1948 racially integrated the Catholic schools of Washington six years before the U.S. Supreme Court ruled segregation unconstitutional.

[13] O'Boyle was created cardinal priest of the Church of San Nicola in Carcere in Rome by Pope Paul VI in the consistory of June 26, 1967.

He was the first person to be interred in a burial chamber constructed inside the Cathedral of St. Matthew the Apostle for the archbishops of Washington.

He was an ardent supporter of Paul VI's encyclical Humanae Vitae, and placed ecclesiastical censures on priests who dissented from its teachings.