Jerome Daniel Hannan (November 29, 1896 – December 15, 1965) was an American prelate of the Roman Catholic Church.
He served as Bishop of Scranton from 1954 until his death.
Hannan was born in Pittsburgh, Pennsylvania, to James and Rose (née Tiernan) Hannan.
He studied at Duquesne University in Pittsburgh, from where he obtained a Bachelor of Arts degree in 1916, and then at St.
Vincent's Seminary in Latrobe, earning a Doctor of Divinity in 1920.
He was ordained to the priesthood on May 22, 1921.
He then served as administrator of Holy Trinity Church in McKeesport and curate at Holy Rosary Church in Pittsburgh until 1923, when he became chaplain at Mount Mercy Academy.
He was also private secretary to Bishop Hugh Charles Boyle from 1923 to 1931.
Hannan earned a Bachelor of Laws from Duquesne in 1931, and a Doctor of Canon Law from the School of Canon Law at Washington, D.C.
He also served as assistant chancellor of the Diocese of Pittsburgh (1934-1939), administrator of St.
Paul's Cathedral (1937-1939), and associate professor of canon law (1940-1951) and vice-rector (1951-1954) at Catholic University of America.
He also served as editor of the journal The Jurist: Studies in Church Law and Ministry.On August 17, 1954, Hannan was appointed the fifth Bishop of Scranton by Pope Pius XII.
He received his episcopal consecration on the following September 21 from Archbishop Amleto Cicognani, with Archbishop Patrick O'Boyle and Bishop Henry Klonowski serving as co-consecrators, in Washington, D.C.
During his tenure, he oversaw the construction of the Chancery building and Saint Pius X Seminary.
Hannan died in Rome in 1965, where he was preparing for the closing session of the Second Vatican Council, at age 69.
In 2018, a University of Scranton hall named in his honor was renamed for two former students who died in crashes, after he was discovered by a Pennsylvania grand jury to have covered up child sex abuse.