Edouard Guillaume Eugène Reuss (German: Eduard Wilhelm Eugen Reuss; July 18, 1804 – April 15, 1891), was a Protestant theologian from Alsace.
He was born at Strasbourg, where he studied philology (1819–22). He went on to study theology at Göttingen under Johann Gottfried Eichhorn; and Oriental Languages at Halle under Wilhelm Gesenius, and afterwards at Paris under Silvestre de Sacy (1827–28). In 1828 he became Privatdozent at Strasbourg. From 1829 to 1834 he taught Biblical criticism and Oriental languages at the Strasbourg Theological School; he then became assistant, and afterwards, in 1836, regular professor of theology at that university. He became Professor of Old Testament at the same institution in 1864. Reuss was appointed as a regular member of the Deutsche Morgenländische Gesellschaft in May 1846. The sympathies of Reuss were German rather than French, and after the annexation of Alsace to Germany he remained at Strasbourg, and retained his professorship till he retired on a pension in 1888. He died in the same city.
Reuss belonged to the liberals in the Lutheran Protestant Church of Augsburg Confession of Alsace and Lorraine. His critical position was to some extent that of K. H. Graf and Julius Wellhausen: he was in a sense their forerunner, and was actually for a time Graf's teacher. The originator of the new movement, he hesitated to publish the results of his studies.