St. Patrick's Society for the Foreign Missions (Latin Societas Sancti Patritii pro Missionibus ad Exteros; also known as the Kiltegan Fathers) is a Catholic society of apostolic life of pontifical right for men composed of missionary priests. Its headquarters is at Kiltegan, County Wicklow in Ireland. Its members add the nominal initials SPS after their names to indicate their membership in the Society. The motto in Latin and English of the Society is Caritas Christi Urget Nos and Christ's love compels us, (2 Corinthians 5:14), respectively.

The Kiltegan Fathers origins stem from an appeal by Bishop Joseph (Ignatius) Shanahan of the Holy Ghost Order, in 1920 to the seminary students in Maynooth College for missionaries to Nigeria, Africa, where he was bishop; later that year Fr. Whitney accompanied Bishop Shanahan to Africa.

The society was founded officially on St Patrick's Day, 17 March 1932 by Monsignor Patrick Whitney (1894 - 1942) at Kiltegan, County Wicklow, Ireland. Its original aim was the Christian evangelization of Nigeria. In 1951, the society expanded its missionary activities outside of Nigeria.^[2]

In the 1950s the society expanded, building a new college in Kiltegan, and opening a House of Studies in Sutton House, Rochestown, Douglas in Cork, with seminarians attending lectures in University College Cork.

In 1997 the Kiltegan Fathers, with the drop in vocations from Ireland, officially decided to open up internationally and set up houses of formation in Nigeria and Kenya. In 2000 trainee priests began studying philosophy in St Joseph's Institute in Cedara, South Africa, and KWA Patrick house was setup. 2002 seen students study theology at the Kiltegan House in Nairobi, as the Society joined other orders in Tangaza University College. Also in 2002 a house of formation was founded in Lusaka, Zambia.

As of 2018, the society has 253 priests on four continents including the countries of Nigeria, Cameroon, Kenya, Malawi, South Sudan, Zambia, Zimbabwe, South Africa, Uganda, Grenada, Brazil, the United States, Italy, England, Scotland, Wales and Ireland.

• Bishop Derek Byrne, SPS - Bishop of Primavera do Leste–Paranatinga, Brazil (2014- ), Bishop of Guiratinga, Brazil (2008-2014)^[9]
• Bishop Edmund Fitzgibbon, SPS - Bishop of the Roman Catholic Diocese of Warri in Nigeria.
• Bishop John Magee, SPS - Bishop of Roman Catholic Diocese of Cloyne, Ireland (1987–2010), Master of Papal Ceremonies, The Vatican (1982–1987), Papal Private Secretary, The Vatican (1978–1982).
• Bishop William Dunne, SPS - Bishop of Kitui (1963-1995)
• Bishop Edmund Fitzgibbon, SPS (1925-2010)
• Bishop John Christopher Mahon, D.C.L, SPS - Bishop of Lodwar, Kenya (1978-2000),
• Bishop James Moynagh, SPS (1903 - 1985)
• Bishop John Alphonsus Ryan MA PhD, SPS
• Bishop Thomas McGettrick, SPS, first Bishop of Abakaliki, Nigeria
• Bishop Maurice Anthony Crowley BSc, SPS, Bishop of the Roman Catholic Diocese of Kitale, Kenya (1998- )

In 2014 St Patrick's Missionary Society held a General Chapter meeting which elected a new leadership team. In 2015 the society commenced moving its headquarters from Kiltegan in Ireland to Nairobi in Kenya.^[4] The Society produces the Africa - St. Patrick's Mission magazine.^[10] The Society has installed a wind turbine in Kiltegan.^[11] There is also a retirement home in Kiltegan for its members.

The Kiltegan Fathers in association with Sisters of the Holy Faith in 2013, worked to set up a primary school in Riwoto, South Sudan.^[12]