August Wilmanns (25 March 1833, Vegesack – 27 October 1917, Berlin) was a German classical philologist and librarian. He studied classical philology at the Universities of Bonn and Tübingen, receiving his doctorate in 1863 with a dissertation on the Roman scholar Marcus Terentius Varro. In 1870 he began work as a librarian at the Universitätsbibliothek in Freiburg, followed by professorships at the Universities of Innsbruck (1871) and Kiel (1873). In 1874 he was named Oberbibliothekar (head librarian) at the University of Königsberg, shortly afterwards, given the same title at the Niedersächsische Staats- und Universitätsbibliothek in Göttingen (1875).