List of geometers

1000 BCE to 1 BCE

• Baudhayana – Euclidean geometry
• Manava – Euclidean geometry
• Thales of Miletus – Euclidean geometry
• Pythagoras – Euclidean geometry, Pythagorean theorem
• Zeno of Elea – Euclidean geometry
• Hippocrates of Chios – first systematically organized Stoicheia – Elements
• Mozi
• Plato
• Theaetetus
• Autolycus of Pitane – astronomy, spherical geometry
• Euclid – Elements, Euclidean geometry
• Apollonius of Perga – Euclidean geometry, conic sections
• Archimedes – Euclidean geometry
• Eratosthenes – Euclidean geometry
• Katyayana – Euclidean geometry

  1–1300 AD

• Hero of Alexandria – Euclidean geometry
• Pappus of Alexandria – Euclidean geometry, projective geometry
• Hypatia of Alexandria – Euclidean geometry
• Brahmagupta – Euclidean geometry, cyclic quadrilaterals
• Vergilius of Salzburg – Irish bishop of Aghaboe, Ossory and later Salzburg, Austria; antipodes, and astronomy
• Al-Abbās ibn Said al-Jawharī
• Thabit ibn Qurra – analytic geometry, non-Euclidean geometry, conic sections
• Abu'l-Wáfa – spherical geometry, spherical triangles
• Ibn al-Haytham
• Omar Khayyam – algebraic geometry, conic sections
• Ibn Maḍāʾ

  1301–1800 AD

• Piero della Francesca
• Leonardo da Vinci – Euclidean geometry
• Jyesthadeva – Euclidean geometry, cyclic quadrilaterals
• Marin Getaldić
• Jacques-François Le Poivre – projective geometry
• Johannes Kepler –
• Edmund Gunter
• Girard Desargues – projective geometry; Desargues' theorem
• René Descartes – invented the methodology of analytic geometry, also called Cartesian geometry after him
• Pierre de Fermat – analytic geometry
• Blaise Pascal – projective geometry
• Christiaan Huygens – evolute
• Giordano Vitale
• Philippe de La Hire – projective geometry
• Isaac Newton – 3rd-degree algebraic curve
• Giovanni Ceva – Euclidean geometry
• Johann Jacob Heber – surveyor and geometer
• Giovanni Gerolamo Saccheri – non-Euclidean geometry
• Leonhard Euler
• Tobias Mayer
• Johann Heinrich Lambert – non-Euclidean geometry
• Gaspard Monge – descriptive geometry
• John Playfair – Euclidean geometry
• Lazare Nicolas Marguerite Carnot – projective geometry
• Joseph Diaz Gergonne – projective geometry; Gergonne point
• Carl Friedrich Gauss – Theorema Egregium
• Louis Poinsot
• Siméon Denis Poisson
• Jean-Victor Poncelet – projective geometry
• Augustin-Louis Cauchy
• August Ferdinand Möbius – Euclidean geometry
• Nikolai Ivanovich Lobachevsky – hyperbolic geometry, a non-Euclidean geometry
• Michel Chasles – projective geometry
• Germinal Dandelin – Dandelin spheres in conic sections
• Jakob Steiner – champion of synthetic geometry methodology, projective geometry, Euclidean geometry

  1801–1900 AD

• Karl Wilhelm Feuerbach – Euclidean geometry
• Julius Plücker
• János Bolyai – hyperbolic geometry, a non-Euclidean geometry
• Christian Heinrich von Nagel – Euclidean geometry
• Johann Benedict Listing – topology
• Hermann Günther Grassmann – exterior algebra
• Ludwig Otto Hesse – algebraic invariants and geometry
• Ludwig Schlafli – Regular 4-polytope
• Pierre Ossian Bonnet – differential geometry
• Arthur Cayley
• Joseph Bertrand
• Delfino Codazzi – differential geometry
• Bernhard Riemann – elliptic geometry and Riemannian geometry
• Julius Wilhelm Richard Dedekind
• Ludwig Burmester – theory of linkages
• Edmund Hess
• Albert Victor Bäcklund
• Max Noether – algebraic geometry
• Henri Brocard – Brocard points
• William Kingdon Clifford – geometric algebra
• Pieter Hendrik Schoute
• Felix Klein
• Sofia Vasilyevna Kovalevskaya
• Evgraf Fedorov
• Henri Poincaré
• Luigi Bianchi – differential geometry
• Alicia Boole Stott
• Hermann Minkowski – non-Euclidean geometry
• Henry Frederick Baker – algebraic geometry
• Élie Cartan
• Dmitri Egorov – differential geometry
• Veniamin Kagan
• Raoul Bricard – descriptive geometry
• Ernst Steinitz – Steinitz's theorem
• Marcel Grossmann
• Oswald Veblen – projective geometry, differential geometry
• Nathan Altshiller Court – author of College Geometry
• Emmy Noether – algebraic topology
• Harry Clinton Gossard
• Arthur Rosenthal
• Helmut Hasse – algebraic geometry

  1901–present

• William Vallance Douglas Hodge
• Patrick du Val
• Beniamino Segre – combinatorial geometry
• J. C. P. Miller
• André Weil – Algebraic geometry
• H. S. M. Coxeter – theory of polytopes, non-Euclidean geometry, projective geometry
• J. A. Todd
• Daniel Pedoe
• Shiing-Shen Chern – differential geometry
• Ernst Witt
• Rafael Artzy
• Aleksandr Danilovich Aleksandrov
• László Fejes Tóth
• Edwin Evariste Moise
• Aleksei Pogorelov – differential geometry
• Magnus Wenninger – polyhedron models
• Jean-Louis Koszul
• Isaak Yaglom
• Eugenio Calabi
• Benoit Mandelbrot – fractal geometry
• Katsumi Nomizu – affine differential geometry
• Michael S. Longuet-Higgins
• John Leech
• Alexander Grothendieck – algebraic geometry
• Branko Grünbaum – discrete geometry
• Michael Atiyah
• Lev Semenovich Pontryagin
• Geoffrey Colin Shephard
• Norman W. Johnson
• John Milnor
• Roger Penrose
• Yuri Manin – algebraic geometry and diophantine geometry
• Vladimir Arnold – algebraic geometry
• Ernest Vinberg
• J. H. Conway – sphere packing, recreational geometry
• Robin Hartshorne – geometry, algebraic geometry
• Phillip Griffiths – algebraic geometry, differential geometry
• Enrico Bombieri – algebraic geometry
• Robert Williams
• Peter McMullen
• Richard S. Hamilton – differential geometry, Ricci flow, Poincaré conjecture
• Mikhail Gromov
• Rudy Rucker
• William Thurston
• Shing-Tung Yau
• Michael Freedman
• Egon Schulte – polytopes
• George W. Hart – sculptor
• Károly Bezdek – discrete geometry, sphere packing, Euclidean geometry, non-Euclidean geometry
• Simon Donaldson
• Kenji Fukaya – symplectic geometry
• Yong-Geun Oh
• Toshiyuki Kobayashi
• Hiraku Nakajima – representation theory and geometry
• Hwang Jun-Muk – algebraic geometry, differential geometry
• Grigori Perelman – Poincaré conjecture
• Maryam Mirzakhani
• Denis Auroux

  Geometers in art