This is an incomplete list of Catholic priests.
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Roman Catholic Church
- Cristóbal Diatristán de Acuña – Jesuit explorer
- Alger of Liège – History
- Abraham Armand – Missionary to Hawaii
- Alexis Bachelot – Missionary to Hawaii
- Antonio Vivaldi – Italian baroque composer
- Erasmus of Rotterdam – Dutch priest and philosopher
- Nicolas Aubry – French priest
- Tissa Balasuriya – Sri Lankan Sinhala theologian
- Mary Bastian – Murdered activist in Sri Lanka
- David Bauer – Hockey player turned priest
- Josef Bisig – Formerly of the Society of St. Pius X, currently of the recognized Priestly Fraternity of St. Peter
- Martin Adolf Bormann – Son of Nazi Martin Bormann who works against Holocaust denial
- Jim Borst – Dutch Missionary in India since 1960
- Martin Stanislaus Brennan – Astronomer and author
- Vincent Robert Capodanno – U.S. Navy chaplain and Medal of Honor recipient.
- Francisco Fernández Carvajal – Author and Opus Dei priest.
- Solanus Casey – Declared venerable by Pope John Paul II.
- William Joseph Chaminade – Faced persecution for being a priest during the French Revolution
- Daniele Comboni – Missionary to Africa, canonized
- John M. Corridan – Anti-corruption activist
- Horacio de la Costa – Filipino Jesuit and writer
- Les Costello – A founder of the Flying Fathers exhibition hockey team
- Peter Coudrin – Faced persecution during French Revolution, later became a missionary to Hawaii
- James Coyle – Murdered Catholic priest
- Johannes Czerski – German clergyman who resigned his vicariate to found German Catholicism
- Jozef De Veuster – Canonized, worked with lepers
- Chandra Fernando – Murdered human rights activist
- Piero Folli – Italian antifascist parish priest
- Joseph Freinademetz – Missionary to China, canonized
- Mariano Gagnon – Franciscan friar and author who helped indigenous people resist the Shining Path in Peru
- Georg Gänswein – Secretary to Pope Benedict XVI
- Augustine Geve – Solomon Islands Catholic priest and politician, murdered in 2002
- Lionel Groulx – French Canadian Nationalist
- Jacques Hamel – Priest killed in the 2016 Normandy church attack.
- Elmer Heindl – American WWII chaplain
- Ignatius of Loyola – Founder of the Society of Jesus
- Itō Mancio – First official Japanese emissary to Europe, after that he became a Jesuit priest
- Saint Arnold Janssen – Missionary
- Marcelline Jayakody, Sri Lankan Sinhala author, composer of hymns, author, journalist
- Mychal F. Judge – Chaplain, 9-11 victim
- Georg Joseph Kamel – Jesuit botanist of whom the Camellia is named after. Compiled works on Philippine medicinal plants, which is well known in pharmacology
- Francis Kilcoyne (died 1985) – President of Brooklyn College
- Georges Lemaître – Physicist and Astronomer. Proposed what would become known as the Big Bang Theory.
- Georges-Henri Lévesque – Sociologist
- Gerard Timoner III – The current master of the Dominican Order
- Eustáquio van Lieshout – Did work in Brazil
- Michael J. McGivney – Founder of the Knights of Columbus
- Heinrich Maier – Head of an important resistance group against Nazi Germany
- Columba Murphy – Involved in gaining an Edict of Toleration for Hawaiian Catholics
- Hugh O'Flaherty – World War II hero
- Nemesi Marqués Oste – Rector in Andorra and political figure there
- Peter Pernin – Survivor and memoirist of the Peshtigo fire
- William Pope – One of John Henry Newman's converts: seceded from Anglicanism to the Church of Rome in 1853
- Wolfgang Rösch – Vicar general of Limburg
- Jean-Baptiste de La Salle – A founder of the Institute of the Brothers of the Christian Schools
- Abraham a Sancta Clara – Catholic preacher in Austria
- Francis Xavier – Jesuit missionary to Japan
- Vinkenti Peev – Bulgarian Capuchin friar
- Thomas Byles – English priest who stayed on board the sinking RMS Titanic hearing confessions
- Michael Nazir-Ali – Former prominent Anglican bishop who became Catholic and was ordained a priest on the 30th of October, 2021
- Eugine Mattioli – Longest serving Catholic missionary in Arabia
- Mihalj Šilobod Bolšić – Roman Catholic priest, mathematician, writer, and musical theorist primarily known for writing the first Croatian arithmetic textbook Arithmatika Horvatzka (published in Zagreb, 1758)
- David Michael Moses – American priest and musician
- Edward Stanger – Pastor at Holy Infant Catholic Church, Ballwin
Eastern Catholic Churches