鲁汶大学的著名校友

赫尔曼·范龙佩 比利时首相、欧洲理事会常任主席
翁文灏，中国地质学之父、近代石油工业之父
克里斯汀·德迪夫，1974年诺贝尔生理学或医学奖得主 （毕业生）
阿尔伯特·克劳德，诺贝尔生理学或医学奖得主 （教授）
南怀仁，字敦伯，又字勋卿 Ferdinand Verbiest (1623-1688) 清初最有影响的来华传教士,康熙的科学启蒙老师.精通天文历法、擅长铸炮,官至工部侍郎。为近代西方科学知识在中国的传播做出了卓越贡献。
杨·史丹东克(Jan Standonck) (1454 - 1504), 神父，罗马天主教的改革运动者，巴黎大学蒙特鸠学院院长，鲁汶大学史丹东克学院创办人。
亚德利安·弗罗礼松·布因思(Adriaan Floriszoon Boeyens) (1459 - 1523), 罗马天主教教宗艾德里安六世，鲁汶大学教皇学院创办人，神圣罗马帝国国王查理五世的老师.
德西德里乌斯·伊拉斯谟(Desiderius Erasmus) (1466 - 1536), 文艺复兴哲学家与神学家，人文主义者.
杰哈德斯·麦卡托(Gerardus Mercator) (1512 - 1594), 地图学家，发明麦卡托圆柱投影法.
安德烈亚斯·维萨留斯(Andreas Vesalius) (1514 - 1564), 现代解剖学之父.
蓝伯特·多东斯(Rembert Dodoens) (1517 - 1585), 植物学家.
朱斯特斯·李普修斯(Justus Lipsius) (1547 - 1606), 人文主义者.
康内留斯·奥图·杨森(Cornelius Otto Jansen) (1585 - 1638), 杨森主义之父.
Charles Nerinckx (1761 - 1824), founder of Sisters of Loretto.
Bernard du Bus de Gisignies (1808 - 1874), law, politician, ornithologist and paleontologist.
Hippoliet Van Peene (1811 - 1864), physician and playwright, wrote the lyrics of the Flemish anthem De Vlaamse Leeuw
Antanas Baranauskas (1835 - 1902), Polish-Lithuanian poet.
Arthur Vierendeel (1852 – 1940) civil engineer.
Albrecht Rodenbach (1856 - 1880), poet.
Charles Jean de la Vallée-Poussin (1866 - 1962), mathematician who proved the prime number theorem.
Frans Van Cauwelaert (1880 - 1961), politician.
Weng Wenhao (1889 - 1971), founder of modern Chinese geography.
Georges Lemaître (1894 - 1966), astronomer, priest and proposer of the Big Bang theory.
Fulton J. Sheen (1895 - 1979), American archbishop, television personality, preacher and writer.
Rafael Ángel Calderón Guardia, (1900 - 1970), physician, social reformer, president of Costa Rica 1940-1944
Saint Alberto Hurtado, (1901-1952), Chilean Jesuit priest, social worker and writer. Canonized in 2005.
Victor Delhez, (1902 – 1985), engraver and artist.
Hendrik Elias, (1902 - 1973), Flemish Nationalist, quisling.
Léon Degrelle, (1906 - 1994), founder of Rexism, quisling.
Jean Charles Snoy et d'Oppuers (1907-1991), law, diplomat, businessman.
Herman Van Breda (1911 - 1974), founder of the Husserl Archives.
André Molitor (1911 - 2005), law, private secretary of Baudouin I of Belgium.
Otto von Habsburg (1912 - ), the current head of the Habsburg family.
汤于翰 (1912 - )，中国癌症医学家 .
彼得·德·桑莫(Pieter De Somer) (1917 - 1985), 荷语天主教鲁汶大学(Katholieke Universiteit Leuven)第一任校长.
Christian de Duve (1917 - ), Nobel Prize in Medicine 1974, for his discoveries concerning the structural and functional organization of the cell.
Anton van Wilderode (1919-1998), Flemish activist and writer.
Aster Berkhof, (1920 - ), Flemish writer.
Malachi Martin (1921 - 1999), Irish writer.
Antoon Vergote (1921 -), catholic priest, theologian, philosopher, psychologist and psychoanalyst (also known as Antoine Vergote).
Jan Zaprudnik (1924 - ), Belarusian American historian and poet.
Geza Vermes (1924 - ), religious historian and translator into English of the Dead Sea Scrolls.
Gustavo Gutierrez (1928 - ), Peruvian Dominican theologian, founder of Liberation Theology.
Camilo Torres Restrepo (1929 - 1966), Colombian priest and guerillero.
Nguza Karl-i-Bond (1938 - 2003), notable Zairian politician[2].
Abdul Qadeer Khan (1936 - ), Pakistani metallurgist considered to be the father of Pakistan's nuclear weapons program.
Emile Boulpaep (1938 - ), MD, President of the Belgian American Educational Foundation.
Baron Piet Van Waeyenberge (1938 - ), economics, President of De Warande.
Bernard Lietaer (1942 - ), economist and author.
Arthur Ulens (1946 - ), chemistry and economics, businessman
Afif Safieh (1950 - ), Palestinian diplomat.