Jaap Mansfeld (born 1936)^[1] is a Dutch Emeritus Professor of philosopher and a historian of philosophy.

Jaap Mansfeld began his studies in 1954 at the University of Utrecht, where he received his doctorate in 1964 with a thesis on Parmenides.^[2] From 1973 until his retirement in 2001 he was a professor of ancient philosophy, and subsequently professor of History of Ancient and Medieval Philosophy, at Utrecht University.^[2] He has been a full member of the Academia Europaea since 1989.,^[3] as well as a member of the board for several scholarly journals.^[2] In 1991 he was elected a member of the Royal Netherlands Academy of Arts and Sciences.^[4] A book was published in honour of his 60th birthday in 1996 by Keimpe Algra, Pieter Willem van der Horst, and David T. Runia.^[5] In 1998, Mansfeld was awarded the Humboldt research award for his outstanding achievements in research and teaching.^[2] Mansfeld was made an honorary citizen of the ancient city of Elea, the town of Parmenides, by the Eleatica conference in 2013.^[6]

Mansfeld's focus is on doxography, and he has had a thirty year collaboration with David Theunis Runia on the fragments and testimonia of the doxographer Aëtios.^[7]

• Die Offenbarung des Parmenides und die menschliche Welt (PhD). University of Utrecht. 1964. OCLC 1329868.
• The pseudo-Hippocratic tract Peri hebdomadōn. Ch. 1-11 and Greek philosophy. Assen: Van Gorcum. 1971. ISBN 9023207017.
• Die Vorsokratiker : griech.-dt. / 1. Milesier, Pythagoreer, Xenophanes, Heraklit, Parmenides. - 1983. - 336 S. Stuttgart: Reclam. 1983. ISBN 3-15-007965-9.
• Die Vorsokratiker II: Zenon, Empedokles, Anaxagoras, Leukipp, Demokrit. Stuttgart: Reclam. 1987. ISBN 3-15-010344-4.
• Die Vorsokratiker : Griechisch/Deutsch. Ditzingen: Reclam, Philipp. 2011. ISBN 978-3-15-010730-0. With Oliver Primavesi
• Studies in Later Greek Philosophy and Gnosticism. Variorum Reprints. 1989. ISBN 978-0-86078-240-7.
• Studies in the historiography of Greek philosophy. Assen, the Netherlands: Van Gorcum. 1990. ISBN 9789023224037.
• Prolegomena Mathematica: From Apollonius of Perga to Late Neoplatonism : With an Appendix on Pappus and the History of Platonism. BRILL. 1998. ISBN 978-90-04-11267-4.
• Aëtiana : the method and intellectual context of a doxographer. with David Theunis, in five volumes.
  • Volume 1: The Sources. Leiden: E.J. Brill. 1997. ISBN 90-04-10580-8.
  • Volume 2: The Compendium. Leiden: E.J. Brill. 2009. ISBN 978-90-04-17206-7.
  • Volume 3: Studies in the Doxographical Traditions of Ancient Philosophy. Leiden: E.J. Brill. 2010. ISBN 978-90-04-18041-3.
  • Volume 4: Towards an Edition of the Aëtian Placita: Papers of the Melbourne Conference, 1–3 December 2015. Leiden: E.J. Brill. 2018. ISBN 978-90-04-36145-4.
  • Volume 5: An Edition of the reconstructed text of the Placita with a commentary and a collection of related texts. Leiden: E.J. Brill. 2020. ISBN 978-90-04-42838-6.

• Algra, Keimpe; van der Horst, Pieter W.; Runia, David Theunis, eds. (1996). Polyhistor : studies in the history and historiography of ancient philosophy : presented to Jaap Mansfeld on his sixtieth birthday. Leiden: E.J. Brill. ISBN 90-04-10417-8.