John Bannon (1829–1913), was an Irish Catholic Jesuit priest who served as a Confederate chaplain during the American Civil War.

In 1846 he went to study for the priesthood at St Patrick's College, Maynooth in the minor seminary until 1850, completed his theology course in 1853, and was ordained on 16 June 1853 by Archbishop Paul Cullen of the Archdiocese of Dublin.

In November 1863 he returned to Ireland, writing and pamphleting to discourage people from emigrating and joining the Union side of the civil war.

Following the civil war he was banned from preaching in St. Louis, and stayed in Ireland, becoming a Jesuit in 1865, spending some time in Milltown Park, Tullabeg College, and in Gardiner Street.

He died on 14 July 1913 in Upper Gardiner Street, and was buried in the Jesuit plot at Glasnevin Cemetery, Dublin.