Bishop Joseph Shanahan B.Sc., C.S.Sp. (1871-1943) was an Irish born priest of the Congregation of the Holy Spirit (Spiritans), who served as s Bishop in Nigeria. Born Joseph Ignatius Shanahan in June 6, 1871 in Glankeen, Borrisoleigh, County Tipperary, Ireland. He joined the Holy Ghost Order in France in 1886, where his uncle Pat Walsh(Brother Adelm) had also joined the Holy Ghost Fathers. He was ordained in 1900 in Blackrock College, and went to Nigeria in 1902.
He was instrumental in the setting up of the Kiltegan Fathers when in 1920, following his ordination in Maynooth as Bishop for Southern Nigeria (then a British protectorate) he appealed to students in Maynooth College for missionaires to Nigeria and Africa.
In 1924 Bishop Shanahan founded a missionary society for women, the Missionary Sisters of the Holy Rosary in Killeshandra, Co Cavan, Ireland.
Bishop Shanahan died at Nairobi, Kenya, on Christmas Day 1943 aged 72 years, and was initially buried in the community cemetery in St Mary’s School in Nairobi, Kenya. However, in January 1956 his remains were brought back to Nigeria for the “second burial” in Onitsha Cathedral.