Philosophers born in the 19th century (and others important in the history of philosophy), listed alphabetically:

Note: This list has a minimal criterion for inclusion and the relevance to philosophy of some individuals on the list is disputed.

• Muhammad Abduh, (1849–1905)^[d]
• Robert Adamson, (1852–1902)
• Jamal al-Din al-Afghani, (1839–1897)^[d]
• Kazimierz Ajdukiewicz, (1890–1963)^[b][c][d]
• Konstantin Sergeyevich Aksakov, (1817–1860)
• Samuel Alexander, (1859–1938)^[a][b][c][d]
• B. R. Ambedkar, (1891–1956)
• Henri-Frédéric Amiel, (1821–1881)
• John Anderson, (1893–1962)^[b][c][d]
• Roberto Ardigò, (1828–1920)
• Valentin Ferdinandovich Asmus, (1894–1975)^[d]
• Sri Aurobindo, (1872–1950)^[b][c][d]
• Richard Avenarius, (1843–1896)^[a][b][c][d]

• Gaston Bachelard, (1884–1962)^[a][b][c][d]
• Alfred Baeumler, (1887–1968)
• Alexander Bain, (1818–1903)^[a][b][c]
• Mikhail Bakhtin, (1895–1975)^[a][b][c][d]
• Mikhail Bakunin, (1814–1876)^[a][b][c][d]
• James Mark Baldwin, (1861–1934)
• Karl Barth, (1886–1968)^[b][c][d]
• Jules Barthélemy-Saint-Hilaire, (1805–1895)
• Georges Bataille, (1897–1962)^[a][d]
• Bruno Bauer, (1809–1882)^[b][c][d][e]
• David Baumgardt, (1890–1963)^[d]
• Oskar Becker, (1889–1964)
• Vissarion Belinsky, (1811–1848)^[d]
• Gustave Belot, (1859–1929)
• Julien Benda, (1867–1956)
• Walter Benjamin, (1892–1940)^[b][c][d]
• Nikolai Berdyaev, (1874–1948)^[a][b][c][d]
• Henri Bergson, (1859–1941)^{[a][b][c][d][e]}
• Eduard Bernstein, (1850–1932)^[d]
• Nathan Birnbaum, (1864–1937)
• Brand Blanshard, (1892–1987)^[b][c]
• Ernst Bloch, (1885–1977)^[a][b][c][d]
• Maurice Blondel, (1861–1949)^[a]
• Benjamin Paul Blood, (1832–1919)
• Hermann Blumenau, (1819–1899)
• George Boas, (1891–1980)
• Alexander Bogdanov, (1873–1928)^[b][c][d]
• Niels Bohr, (1885–1962)^[b][c][d]
• Ludwig Boltzmann, (1844–1906)^[a][b][c]
• John Elof Boodin, (1869–1950)
• George Boole, (1815–1864)^[b][c][d][e]*
• Bernard Bosanquet, (1848–1923)^{[a][b][c][d][e]}
• Emile Boutroux, (1845–1921)^[d]
• Oets Kolk Bouwsma, (1898–1978)^[a]
• Borden Parker Bowne, (1847–1910)^[d]
• F. H. Bradley, (1846–1924)^{[a][b][c][d][e]}
• Franz Brentano, (1838–1917)^{[a][b][c][d][e]}
• Percy Williams Bridgman, (1882–1961)^[b][c][d]
• Edgar S. Brightman, (1884–1953)^[b][c]
• C. D. Broad, (1887–1971)^[a][b][c][d]
• Luitzen Egbertus Jan Brouwer, (1881–1966)^[a][b][c][e]
• Orestes Brownson, (1803–1876)^[b][c]
• Constantin Brunner, (1862–1937)
• Emil Brunner, (1889–1966)^[d]
• Leon Brunschvicg, (1869–1944)^[a][b][c][d]
• James Bryce, 1st Viscount Bryce, (1838–1922)^[d]
• Martin Buber, (1878–1965)^{[a][b][c][d][e]}
• Ludwig Büchner, (1824–1899)^[d]
• Sergei Nikolaevich Bulgakov, (1871–1944)^[d]
• Rudolf Bultmann, (1884–1976)^[b][c][d]
• Jacob Burckhardt, (1818–1897)^[b][c]
• Samuel Butler, (1835–1902)^[b][c]

• Cai Yuanpei, (1868–1940)
• Edward Caird, (1835–1908)^[a]
• Mary Whiton Calkins, (1863–1930)
• Norman Robert Campbell, (1880–1949)^[a][d]
• Georg Cantor, (1845–1918)^[a][b][c][d]
• Pantaleo Carabellese, (1877–1948)^[a]
• Rudolf Carnap, (1891–1970)^{[a][b][c][d][e]}*
• Lewis Carroll, (1832–1898)^[a][b][c][d]
• Paul Carus, (1852–1919)
• Ernst Cassirer, (1874–1945)^{[a][b][c][d][e]}
• Carlo Cattaneo, (1801–1869)^[d]
• Emile Auguste Chartier, (1868–1951)
• Nikolai Chernyshevsky, (1828–1889)^[d]
• Ch'ien Mu, (1895–1990)^[a]
• Leon Chwistek, (1884–1944)
• August Cieszkowski, (1814–1894)^[d]
• William Kingdon Clifford, (1845–1879)^[a][b][c]
• Chapman Cohen, (1868–1954)
• Hermann Cohen, (1842–1918)^{[a][b][c][d][e]}*
• R. G. Collingwood, (1889–1943)^{[a][b][c][d][e]}
• Josephus Flavius Cook, (1838–1901)
• John Cook Wilson, (1849–1915)^[a][c]
• Ananda Kentish Coomaraswamy, (1877–1947)
• Hans Cornelius, (1863–1947)
• Antoine Augustin Cournot, (1801–1877)^[a][d]
• Louis Couturat, (1868–1914)^[a][b][c]
• James Edwin Creighton, (1861–1924)
• Benedetto Croce, (1866–1952)^[a][b][c][d]
• Tadeusz Czezowski, (1889–1981)
• Heinrich Czolbe, (1819–1873)^[a]

• Nikolay Danilevsky (1822–1885)
• Charles Darwin, (1809–1882)^[d]
• Augustus De Morgan, (1806–1871)^[a][b][c][d]
• Francesco de Sanctis, (1817–1883)
• Richard Dedekind, (1831–1916)^[a][b][c][d]
• Galvano Della Volpe, (1895–1968)
• Paul Deussen, (1845–1919)
• John Dewey, (1859–1952)^[a][b][c][d]
• Albert Venn Dicey, (1835–1922)^[d]
• Wilhelm Dilthey, (1833–1911)^[a][b][c][d]
• Hugo Dingler, (1881–1954)
• Juan Donoso Cortés (1809–1853)
• Herman Dooyeweerd, (1894–1977)^[d]
• Fyodor Dostoevsky, (1821–1881)^[d]
• Hans Adolf Eduard Driesch, (1867–1941)
• Emil du Bois-Reymond, (1818–1896)^[d]
• Curt Ducasse, (1881–1969)^[a][b][c][d]
• Pierre Duhem, (1861–1916)^[a][b][c][d]
• Eugen Dühring, (1833–1921)^[b][c][d]
• Émile Durkheim, (1858–1917)^[b][c][d]
• Manilal Dwivedi, (1858–1898)

• Julius Ebbinghaus, (1885–1981)
• Arthur Eddington, (1882–1944)
• Mary Baker Eddy, (1821–1910)
• Christian von Ehrenfels, (1856–1932)
• Albert Einstein, (1879–1955)^[a][b][c][d]
• George Eliot, (1819–1880)^[d]
• Ralph Waldo Emerson, (1803–1882)^{[a][b][c][d][e]}
• Friedrich Engels (1820–1895)^[a][b][c][d]
• Rudolf Christoph Eucken, (1846–1926)
• Julius Evola, (1898–1974)

• Thome H. Fang, (1899–1976)^[a]
• Gustav Fechner, (1801–1887)^[a][d]
• Feng Youlan, (1895–1990)^[a]
• Ernest Fenollosa, (1853–1908)
• Giuseppe Ferrari, (1812–1876)
• James Frederick Ferrier, (1808–1864)^[d]
• Ludwig Feuerbach, (1804–1872)^{[a][b][c][d][e]}
• Kuno Fischer, (1824–1907)
• John Fiske, (1842–1901)
• Franciszek Fiszer, (1860–1937)
• Robert Flint, (1838–1910)
• Pavel Aleksandrovich Florenskii, (1882–1937)^[d]
• Georges Florovsky, (1893–1979)
• Jerome Frank, (1889–1957)^[d]
• Philipp Frank, (1884–1966)
• Semën Liudvigovich Frank (1877–1950)^[d]
• Gottlob Frege, (1848–1925)^{[a][b][c][d][e]}
• Sigmund Freud, (1856–1939)^[a][b][c][d]
• Hans Freyer, (1887–1969)
• Nikolai Fyodorovich Fyodorov, (1829–1903)^[d]

• Mahatma Gandhi, (1869–1948)^[a][b][c][d]
• Réginald Garrigou-Lagrange, (1887–1964)^[d]
• Nārāyana Guru, (1856–1928)
• Giovanni Gentile, (1875–1944)^[a][b][c][d]
• Otto von Gierke, (1841–1921)
• Charlotte Perkins Gilman, (1860–1935)
• Étienne Gilson, (1884–1978)^[a][b][c]
• Asher Ginsberg (or Ahad Ha'am), (1856–1927)^[d]
• Vincenzo Gioberti, (1801–1852)^[a][d]
• Arthur de Gobineau, (1816–1882)
• Henry George, (1839–1897)
• Antonio Gramsci, (1891–1937)^[a][b][c][d]
• Thomas Hill Green, (1836–1882)^{[a][b][c][d][e]}
• Kurt Grelling, (1886–1942)
• John Grote, (1813–1866)^[d]
• D. V. Gundappa, (1889–1975)
• G. I. Gurdjieff, (1872–1949)
• Edmund Gurney, (1847–1888)^[d]

• Paul Häberlin, (1878–1960)
• Ernst Haeckel, (1834–1919)^[a][d]
• Axel Hägerström, (1868–1939)^[d]
• Béla Hamvas, (1897–1968)
• Eduard Hanslick, (1825–1904)^[d]
• Friedrich Harms, (1819–1880)
• William Torrey Harris, (1835–1909)
• Eduard Von Hartmann, (1842–1906)^[a][b][c][d]
• Nicolai Hartmann, (1882–1950)^{[a][b][c][d][e]}*
• Charles Hartshorne, (1897–2000)^[a][b][c][e]
• Friedrich Hayek, (1899–1992)^[b][c][d]
• Rudolf Haym, (1821–1901)
• Martin Heidegger, (1889–1976)^{[a][b][c][d][e]}*
• Hermann von Helmholtz, (1821–1894)^[a][d]
• Heinrich Rudolf Hertz, (1857–1894)^[d]
• Alexander Herzen, (1812–1870)^[a][b][c][d]
• Moses Hess, (1812–1875)^[d]
• Sergei Hessen, (1887–1950)^[d]
• David Hilbert, (1862–1943)^[a][b][c]
• Dietrich von Hildebrand, (1889–1977)
• Leonard Trelawny Hobhouse, (1864–1929)^[b][c]
• William Ernest Hocking, (1873–1966)^[b][c]
• Shadworth Hodgson, (1832–1912)^[b][c]
• Eric Hoffer, (1898–1983)^[b][c]
• Harald Høffding, (1843–1931)^[b][c]
• Wesley Newcomb Hohfeld, (1879–1918)^[a][d]
• Oliver Wendell Holmes Jr., (1841–1935)^[d]
• Max Horkheimer, (1895–1973)^[a][d]
• Hsiung Shih-li, (1885–1968)^[a]
• Hu Shih, (1891–1962)^[a]
• Elbert Hubbard, (1856–1915)
• Edmund Husserl, (1859–1938)^{[a][b][c][d][e]}
• Thomas Henry Huxley, (1825–1895)^[d]

• Ivan Aleksandrovich Il'in, (1883–1954)^[a][d]
• Roman Ingarden, (1893–1970)^{[a][b][c][d][e]}
• William Ralph Inge, (1860–1954)^[d]
• Muhammad Iqbal, (1877–1938)^[b][c][d]

• Henry James Sr., (1811–1882)
• William James, (1842–1910)^{[a][b][c][d][e]}
• Alfred Jarry, (1873–1907)
• Karl Jaspers, (1883–1969)^{[a][b][c][d][e]}*
• William Stanley Jevons, (1835–1882)^[a][b][c][e]*
• Rudolf von Jhering, (1818–1892)^[d]
• Krishnamurti Jiddu, (1895–1986)
• C.E.M. Joad, (1891–1953)
• William Ernest Johnson, (1858–1931)^[a][b][c]
• Jørgen Jørgensen, (1894–1969)^[b][c]
• Carl Jung, (1875–1961)^[a][b][c][d]
• Ernst Jünger, (1895–1998)

• Kang Youwei, (1858–1927)^[a]
• Mordecai Kaplan, (1881–1983)^[d]
• Michael Ivanovich Karinski (1840–1917)
• Karl Kautsky, (1854–1938)^[b][c][d]
• Konstantin Kavelin (1818–1885)
• Hans Kelsen, (1881–1973)^[b][c][d]
• Norman Kemp Smith, (1872–1958)^[d]
• John Maynard Keynes, (1883–1946)^[a][b][c][d]
• Hermann von Keyserling, (1880–1946)
• Aleksey Khomyakov (1804–1860)
• Søren Kierkegaard, (1813–1855)^{[a][b][c][d][e]}
• Nishida Kitaro (1870–1945)
• Wolfgang Köhler, (1887–1967)^[a]
• Feliks Koneczny (1862–1949)
• Alejandro Korn, (1860–1936)^[b][c]
• Tadeusz Kotarbiński, (1886–1981)^[a][b][c][d]
• Alexandre Koyre, (1892–1964)^[d]
• Karl Kraus, (1874–1936)^[b][c]
• Jiddu Krishnamurti, (1895–1986)
• Leopold Kronecker, (1823–1891)^[d]
• Richard Kroner, (1884–1974)
• Peter Kropotkin, (1842–1921)^[a][b][c][d]
• Kuki Shūzō, (1888–1941)^[d]

• Antonio Labriola, (1843–1904)^[a][d]
• Jules Lachelier, (1832–1918)^[d]
• Pierre Laffitte, (1823–1903)^[a]
• Friedrich Albert Lange, (1828–1875)^[a][d][e]
• Susanne Langer, (1895–1985)^[b][d]
• Ferdinand Lassalle, (1825–1864)^[d]
• Peter Lavrovitch Lavrov, (1823–1900)^[d]
• Moritz Lazarus, (1824–1903)
• Edouard Louis Emmanuel Julien Le Roy, (1870–1954)^[d]
• Adrian LeMors, (1893–1956)
• Vladimir Lenin, (1870–1924)^[a][b][c][d]
• Konstantin Nikolaevich Leont'ev, (1831–1891)^[d]
• Jules Lequier, (1814–1862)^[a]
• Stanisław Leśniewski, (1886–1939)^[a][b][c][d]
• Lucien Lévy-Bruhl, (1857–1939)^[b][c]
• George Henry Lewes, (1817–1878)
• Kurt Lewin, (1890–1947)^[a]
• Clarence Irving Lewis, (1883–1964)^{[a][b][c][d][e]}*
• C. S. Lewis, (1898–1963)^[a][d]
• John Lewis, (1889–1976)
• Liang Qichao (or Liang Ch'i-ch'ao), (1873–1929)^[a]
• Liang Sou-ming, (1893–1988)^[a]
• Karol Libelt, (1807–1875)
• Israel Lipkin, (1810–1883)^[e]*
• Émile Littré, (1801–1881)
• Liu Shaoqi (orLiu Shao-ch'i), (1898–1969)^[a]
• Karl Nickerson Llywelyn, (1893–1962)^[d]
• Alain LeRoy Locke, (1886–1954)
• Alfred Loisy, (1857–1940)^[d]
• Jakob Lorber, (1800–1864)
• Aleksei Fedorovich Losev, (1893–1988)^[d]
• Nicholas Onufrievich Lossky, (1870–1965)^[d]
• Hermann Lotze, (1817–1881)^{[a][b][c][d][e]}
• Arthur O. Lovejoy, (1873–1962)^[b][c]
• Georg Lukács, (1885–1971)^[a][b][c][d]
• Jan Łukasiewicz, (1878–1956)^[a][b][c][d]
• Rosa Luxemburg, (1871–1919)^[d]

• Mikhail Bakhtin, (1895–1975)
• Ernst Mach, (1838–1916)^{[a][b][c][d][e]}
• John Macmurray, (1891–1976)^[c]
• Philipp Mainländer, (1841–1876)
• Ernst Mally, (1879–1944)^[e]
• Karl Mannheim, (1893–1947)^[a][b][c]
• Henry Longueville Mansel, (1820–1871)^[a]
• Mao Zedong (or Mao Tse-tung), (1893–1976)^[a]
• Gabriel Marcel, (1887–1973)^{[a][b][c][d][e]}
• Herbert Marcuse, (1898–1979)^[a][b][c][d]
• Jacques Maritain, (1882–1973)^{[a][b][c][d][e]}
• Harriet Martineau, (1802–1876)^[d]
• James Martineau, (1805–1900)^[a][b][c]
• Karl Marx, (1818–1883)^{[a][b][c][d][e]}
• Tomáš Garrigue Masaryk, (1850–1937)^[b][c][d]
• Fritz Mauthner, (1849–1923)^[d]
• James Clerk Maxwell, (1831–1879)^[a]12^[d]
• James McCosh, (1811–1894)^[a]
• William McDougall, (1871–1938)^[a]
• John Ellis McTaggart, (1866–1925)^[a][b][c][d]
• George Herbert Mead, (1863–1931)^[a][b][c][d]
• Georg Mehlis, (born 19th century)
• Friedrich Meinecke, (1862–1954)^[d]
• Alexius Meinong, (1853–1920)^{[a][b][c][d][e]}*
• Gregor Mendel, (1822–1884)^[a]
• Marcelino Menéndez y Pelayo, (1856–1912)
• Désiré-Joseph Mercier, (1851–1926)^[a]
• Franklin Merrell-Wolff, (1887–1985)
• Emile Meyerson, (1859–1933)^[b][c][d]
• Carlo Michelstaedter, (1887–1910)
• Nikolai Konstantinovich Mikhailovskii, (1842–1904)^[d]
• Miki Kiyoshi, (1897–1945)^[d]
• John Stuart Mill, (1806–1873)^{[a][b][c][d][e]}
• Ludwig von Mises, (1881–1973)
• William Mitchell, (1861–1962)
• Dimitrije Mitrinovic, (1887–1953)
• W. H. S. Monck (1839–1915)
• Maria Montessori (1870–1952)
• Addison Webster Moore, (1866–1930)
• G. E. Moore, (1873–1958)^{[a][b][c][d][e]}
• Gaetano Mosca, (1858–1941)^[a]
• John Henry Muirhead, (1855–1940)
• Max Müller, (1823–1900)

• Paul Gerhard Natorp, (1854–1924)^[e]
• John Neihardt, (1881–1973)
• Leonard Nelson, (1882–1927)
• Otto Neurath, (1882–1945)^[b][c][d]
• John Henry Newman, (1801–1890)^[a][d]
• H. Richard Niebuhr, (1894–1962)^[d]
• Reinhold Niebuhr, (1892–1971)^[d]
• Friedrich Nietzsche, (1844–1900)^{[a][b][c][d][e]}
• Nishi Amane, (1829–1897)^[d]
• Nishida Kitaro, (1870–1945)^[b][c][d][e]
• Shalva Nutsubidze, (1888–1969)
• Anders Nygren, (1890–1978)^[d]

• Georges Ohsawa, (1893–1966)
• Karl Olivecrona, (1897–1980)^[d]
• John Wood Oman, (1860–1939)^[d]
• José Ortega y Gasset, (1883–1955)^[a][b][c][d]
• Rudolf Otto, (1869–1937)^[d]
• P. D. Ouspensky, (1878–1947)

• Vilfredo Pareto, (1848–1923)
• Giuseppe Peano, (1858–1932)^[b][c]
• Benjamin Peirce, (1809–1880)^[e]
• Charles Sanders Peirce, (1839–1914)^{[a][b][c][d][e]}
• Ralph Barton Perry, (1876–1957)^[a][b][c]
• Leon Petrazycki, (1867–1931)^[d]
• Branislav Petronijević, (1875–1954)
• Jean Piaget, (1896–1980)^[a][d]
• Max Planck, (1858–1947)^[b][c][d]
• Georgi Plekhanov, (1856–1918)^[a][b][c][d]
• Konstantin Pobedonostsev, (1827–1907)
• Henri Poincaré, (1854–1912)^[a][b][c][d]
• Michael Polanyi, (1891–1976)^[d]
• Emil Leon Post, (1897–1954)^[d]
• Roscoe Pound, (1870–1964)^[d]
• Karl von Prantl, (1820–1888)
• Henry Habberley Price, (1899–1984)^[b][c]
• Harold Arthur Prichard, (1871–1947)^[a][b][c][d]
• Pierre-Joseph Proudhon, (1809–1865)^[a][b][c][d]

• Gustav Radbruch, (1878–1949)^[d]
• Sarvepalli Radhakrishnan, (1888–1975)^[b][c][d]
• Hastings Rashdall, (1858–1924)^[a][b][c][d]
• Felix Ravaisson-Mollien, (1813–1900)^[d]
• Paul Rée, (1849–1901)^[b][c]
• Wilhelm Reich, (1897–1957)^[b][c]
• Hans Reichenbach, (1891–1953)^[a][b][c][d]
• Adolf Reinach, (1883–1917)^[d]
• Karl Renner, (1870–1950)^[d]
• Charles Bernard Renouvier, (1815–1903)^[a][b][c][d]
• I. A. Richards, (1893–1979)
• Heinrich Rickert, (1863–1936)^[e]*
• Bernhard Riemann, (1826–1866)
• George Croom Robertson, (1842–1892)
• Erwin Rohde, (1845–1898)
• Francisco Romero (1891–1962)^[b][c]
• Johann Karl Friedrich Rosenkranz, (1805–1879)
• Franz Rosenzweig, (1886–1929)^[a][b][c][d]
• Alf Niels Christian Ross, (1899–1979)^[d]
• William David Ross, (1877–1971)^[a][b][c][d]
• Josiah Royce, (1855–1916)^{[a][b][c][d][e]}
• Vasily Rozanov, (1856–1919)^[d]
• Arnold Ruge, (1802–1880)^[d]
• Bertrand Russell, (1872–1970)^{[a][b][c][d][e]}

• Émile Saisset, (1814–1863)
• George Santayana, (1863–1952)^{[a][b][c][d][e]}
• Ferdinand de Saussure, (1857–1913)^[a][d]
• Max Scheler, (1874–1928)^[a][b][c][d]
• F. C. S. Schiller, (1864–1937)^[d]
• Moritz Schlick, (1882–1936)^[b][c][d]
• Carl Schmitt, (1888–1985)^[d]
• Erwin Schrödinger, (1887–1961)^[a]
• Joseph Schumpeter, (1883–1950)^[d]
• Alfred Schütz, (1899–1959)^[b][c][d][e]
• Albert Schweizer, (1875–1965)
• Charles Secrétan, (1815–1895)
• Roy Wood Sellars, (1880–1973)^[b][c]
• Lev Shestov, (1866–1938)^[d]
• Gustav Gustavovich Shpet, (1879–1937)^[a][d]
• Henry Sidgwick, (1838–1900)^{[a][b][c][d][e]}
• Georg Simmel, (1858–1918)^[a][d]
• Thoralf Skolem, (1887–1963)^[a]
• Vladimir Solovyov, (1853–1900)^[a][b][c][d]
• Georges Sorel, (1847–1922)^[a][b][c][d]
• William Ritchie Sorley, (1855–1935)
• Othmar Spann, (1878–1950)
• Herbert Spencer, (1820–1903)^{[a][b][c][d][e]}
• Thomas Spencer Baynes, (1823–1887)
• Oswald Spengler, (1880–1936)
• Afrikan Spir, (1837–1890)^[a]
• Lysander Spooner, (1808–1887)
• Walter Terence Stace, (1886–1967)
• Henry Stanton, (1805–1887)
• Olaf Stapledon, (1886–1950)
• L. Susan Stebbing, (1885–1943)
• Edith Stein, (1891–1942)
• Rudolf Steiner, (1861–1925)^[a][d]
• Leslie Stephen, (1832–1904)^[a]
• James Hutchison Stirling, (1820–1909)
• Max Stirner, (1806–1856)^{[a][b][c][d][e]}
• George Frederick Stout, (1860–1944)^[a][b][c]
• David Friedrich Strauss, (1808–1874)^[d]
• Leo Strauss, (1899–1973)^[d]
• Carl Stumpf, (1848–1936)
• James Sully, (1842–1923)
• Sun Yat-sen, (1866–1925)^[a]

• Debendranath Tagore, (1817–1905)
• Rabindranath Tagore, (1861–1941)^[b][c][d]
• Hippolyte Taine, (1828–1893)^[d]
• T'an Ssu-t'ung, (1864–1898)^[a]
• Tanabe Hajime, (1885–1962)^[b][c][d]
• Władysław Tatarkiewicz, (1886–1980)
• Harriet Taylor Mill, (1807–1858)^[a][d][e]
• Gustav Teichmuller (1837–1888)^[a]
• Pierre Teilhard de Chardin, (1881–1955)^[a][d]
• William Temple, (1881–1944)^[d]
• Frederick Robert Tennant, (1866–1957)^[d]
• Henry David Thoreau, (1817–1862)^{[a][b][c][d][e]}
• Paul Tillich, (1886–1965)^[a][d]
• Alexis de Tocqueville, (1805–1859)^[d]
• Leo Tolstoy, (1828–1910)^[d]
• Friedrich Adolf Trendelenburg, (1802–1872)
• Ernst Troeltsch, (1865–1923)^[a][d]
• Leon Trotsky, (1879–1940)^[b][c][d]
• Benjamin Tucker, (1854–1939)
• Kazimierz Twardowski, (1866–1938)^[b][c][d]

• Pietro Ubaldi, (1886–1972)
• Hermann Ulrici, (1806–1884)
• Miguel de Unamuno, (1864–1936)^[a][b][c][d]
• Dimitri Uznadze, (1886–1950)

• Hans Vaihinger, (1852–1933)^[a][b][c][d]
• John Veitch, (1829–1894)
• John Venn, (1834–1923)^[d]
• Milan Vidmar, (1885–1962)
• Lev Vygotsky, (1896–1934)^[b][c][d]
• Boris Petrovich Vysheslavtsev, (1877–1954)^[d]

• Jean Wahl, (1888–1974)
• Friedrich Waismann, (1896–1959)
• Alfred Russel Wallace, (1823–1913)^[d]
• James Ward, (1843–1925)^[a]
• John B. Watson, (1878–1958)^[b][c]
• Watsuji Tetsuro, (1889–1960)^[b][c][d][e]
• Max Weber, (1864–1920)^{[a][b][c][d][e]}*
• Otto Weininger, (1880–1903)
• Christian Hermann Weisse, (1801–1866)
• Victoria, Lady Welby, (1837–1912)
• Felix Weltsch, (1884–1964)
• Edvard Westermarck, (1862–1939)^[a]
• Hermann Weyl, (1885–1955)^[d]
• Frantisek Weyr (or Franz Weyr), (1879–1951)^[d]
• Alfred North Whitehead, (1861–1947)^{[a][b][c][d][e]}
• Wilhelm Windelband, (1848–1915)^[a][e]*
• Stanislaw Ignacy Witkiewicz, (1885–1939)
• Ludwig Wittgenstein, (1889–1951)^{[a][b][c][d][e]}
• Woo Tsin-hang (or Chih-hui), (1865–1953)
• Chauncey Wright, (1830–1875)^[a][b][c][e]
• Dorothy Maud Wrinch, (1894–1976)
• Wilhelm Wundt, (1832–1920)^[a][d][e]*

• Peter Wessel Zapffe, (1899–1990)
• Eduard Zeller, (1814–1908)
• Ernst Zermelo, (1871–1953)^[d]
• Zhang Dongsun, (1886–1973)
• Florian Znaniecki, (1882–1958)
• Xavier Zubiri, (1889–1983)

• Lists of philosophers
• 19th-century philosophy
• List of philosophers born in the centuries BC
• List of philosophers born in the 1st through 10th centuries
• List of philosophers born in the 11th through 14th centuries
• List of philosophers born in the 15th and 16th centuries
• List of philosophers born in the 17th century
• List of philosophers born in the 18th century
• List of philosophers born in the 20th century