Johann Heinrich Joseph Düntzer (July 12, 1813 - December 16, 1901), German philologist and historian of literature, was born at Cologne.

After studying philology and especially ancient classics and Sanskrit at Bonn and Berlin (1830-1835), he took the degree of doctor of philosophy and established himself in 1837 at Bonn as Privatdozent for classical literature. He had already, in his Goethes Faust in seiner Einheit und Ganzheit (1836) and Goethe als Dramatiker (1837), advocated a new critical method in interpreting the German classics, which he wished to see treated like the ancient classics.

He subsequently turned his attention almost exclusively to the poets of the German classical period, notably Goethe and Schiller. Düntzer's method met with much opposition and he consequently failed to obtain the professorship he coveted. In 1846 he accepted the post of librarian at the Roman Catholic gymnasium in Cologne, where he died. Düntzer was a painstaking and accurate critic, but lacking in inspiration and finer literary taste; consequently his work as a biographer and commentator has, to a great extent, been superseded and discredited.

Among his philological writings may be mentioned:

• Die Lehre von der lateinischen Wortbildung (1836)
• Die Deklination der indogermanischen Sprachen (1839)
• Homer und der epische Kyklos (1839)
• Die homerischen Beiwörter des Götter- und Menschengeschlechts (1859).

Of his works on the German classical poets, especially Goethe, Schiller and Herder, the following are particularly worthy of note:

• Erläuterungen zu den deutschen Klassikern (1853-1892)
• Goethes Prometheus und Pandora (1850)
• Goethes Faust (2 vols., 1850-1851; 2nd ed. 1857)
• Goethes Götz und Egmont (1854)
• Aus Goethes Freundeskreise (1868)
• Abhandlungen zu Goethes Leben und Werken (2 vols, 1885)
• Goethes Tagebücher der sechs ersten weimarischen Jahre (1889)
• Goethes Leben (1880; 2nd ed. 1883; Engl. transl. by T Lyster, London, 1884)
• Schillers Leben (1881)
• Schiller und Goethe (1859)
• Übersicht und Erläuterung zum Briefwechsel zwischen Schiller und Goethe (1859)
• Herders Reise nach Italien (1859)
• Aus Herders Nachlass (3 vols., 1856-1857)
• Charlotte von Stein (1874).