John Michael McNamara was an American clergyman of the Roman Catholic Church.
Mcnamara, John M. was born on August 12, 1878 in Baltimore, Maryland, United States. Son of Michael and Margaret (McNealey) Mcnamara.
Bachelor of Arts, Loyola College, Baltimore, 1897. Bachelor of Sacred Theology, St. Mary’s Seminary, Baltimore, 1902. Doctor of Laws, Gonzaga College, 1922.
He served as an auxiliary bishop of the Archdiocese of Baltimore (1927–1947) and of the Archdiocese of Washington (1947–1960). He was ordained to the priesthood by Cardinal James Gibbons on June 21, 1902. He then did pastoral work in the Archdiocese of Baltimore and in the Diocese of Wilmington, and became the founding pastor of St. Gabriel Church in Washington, D.C. in 1919.
On December 16, 1927, McNamara was appointed Auxiliary Bishop of Baltimore and Titular Bishop of Eumenia by Pope Pius XI. He received his episcopal consecration on March 29, 1928 from Archbishop Michael Joseph Curley, with Bishops William Joseph Hafey and Thomas Joseph Toolen serving as co-consecrators, at the Cathedral of the Assumption. He served as vicar general of the archdiocese, and was named an Assistant at the Pontifical Throne on March 30, 1947. On November 15, 1947, McNamara was appointed Auxiliary Bishop of the newly erected Archdiocese of Washington.
He assumed the role of vicar general in Washington as well. Throughout his ecclesiastical career, he actively supported the canonization of Mother Elizabeth Ann Seton, and ordained nearly 2,000 men to the priesthood. McNamara continued to serve as an auxiliary bishop until his death at age 82.
Bishop McNamara High School bears the name of the bishop.