His Excellency, The Most Reverend Jeremiah Francis Shanahan
Bishop of Harrisburg
Church	Roman Catholic Church
See	Diocese of Harrisburg
In office	July 12, 1868 – September 24, 1886
Predecessor	none
Successor	Thomas McGovern
Orders
Ordination	July 3, 1859 by John Neumann
Consecration	July 12, 1868 by James Frederick Wood
Personal details
Born	(1834-07-17)July 17, 1834 Silver Lake, Pennsylvania, US
Died	September 24, 1886(1886-09-24) (aged 52) Harrisburg, Pennsylvania, US

Jeremiah Francis Shanahan (July 17, 1834 – September 24, 1886) was an American prelate of the Roman Catholic Church. He was the first bishop of the Diocese of Harrisburg in Pennsylvania from 1868 until his death in 1886.

Shanahan was born on July 17, 1834, in Silver Lake, Pennsylvania, to John and Margaret (née Donovan) Shanahan, who came to the United States from County Cork, Ireland.^[1] After graduating from St. Joseph's Academy near Binghamton, New York in 1852, Shanahan entered St. Charles Borromeo Seminary in Philadelphia.^[1]

Shanahan was ordained to the priesthood by Bishop John Neumann on July 3, 1859.^[2] He then served as curate at the Cathedral of Sts. Peter and Paul and rector of the preparatory seminary in Glen Riddle, Pennsylvania.^[1]

On March 3, 1868, Shanahan was appointed the first bishop of the newly erected Diocese of Harrisburg by Pope Pius IX.^[2] He received his episcopal consecration on July 12, 1868, from Bishop James Frederick Wood, with Bishops John McGill and Michael Domenec serving as co-consecrators, at Saints Peter and Paul Cathedral.^[2]

Located in South Central Pennsylvania, the new diocese comprised Adams, Clinton, Columbia, Cumberland, Dauphin, Franklin, Fulton, Juniata, Lancaster, Lebanon, Mifflin, Montour, Northumberland, Perry, Snyder, Union, and York counties.^[3] There were 25,000 Catholics, 22 priests, 40 churches and missions, and seven parochial schools.^[3]

Upon arriving in Harrisburg, Shanahan became pastor of St. Patrick's Church, which he designated as the cathedral.^[1] He opened Sylvan Heights Seminary at Harrisburg in October 1883, and introduced into the diocese the Sisters of Mercy, Sisters of St. Joseph, Sisters of Christian Charity, Sisters of the Holy Cross, and Sisters of Charity.^[3] Shanahan presided over a period of great growth, and by the time of his death there were 51 priests, 51 churches, 75 chapels and missions, three orphanages, 29 parochial schools, and over 35,000 Catholics.^[1]

Shanahan died on September 24, 1886, in Harrisburg at age 52.^[1] His younger brother John W. Shanahan, who also served as Bishop of Harrisburg (1899–1916).^[2]