Paul Heinrich Emil Baehrens (24 September 1848, Bayenthal – 26 September 1888, Groningen) was a German classical scholar.
After completing his studies he became Privatdozent at Jena. In 1877 he was appointed ordinary professor at the University of Groningen. He published editions of many Latin authors, including Catullus, Propertius and minor poets.
His son Wilhelm Baehrens also became a classical scholar.
Baehrens was the son of Paul Baehrens, a businessman, and his wife Maria (née Hagen). After the death of his father (1850), his mother married Dr. G. A. Hesse, who became like a second father to Baehrens. He was originally supposed to become a businessman, but in accordance with his aptitude Baehrens attended the Friedrich-Wilhelm-Gymnasium in Cologne and after his final exam began his studies in classical philology at the Rheinische Friedrich-Wilhelms-Universität Bonn. His teachers included Jacob Bernays, Franz Bücheler, Friedrich Heimsoeth, Joseph Klein, August Reifferscheid, Franz Ritter, and Anton Springer. Most influential on Baehrens was Lucian Müller, as well as Otto Jahn and Hermann Usener, who gave him metrical and paleographical exercises, which brought him in 1868 to the Philological Seminar. In 1870 Baehrens took the "Oberlehrerexamen" and earned his doctorate. From 1871 to 1872 his deepened his studies at the University of Leipzig with the critic Friedrich Ritschl. Finally, he undertook his first educational trip, where he saw antique manuscripts in Munich, Milan, Bologna, Pisa, Venedig, Florence, Lucca, Siena, Rome, and Naples. In Rome he stayed six months at the Deutsches Archaeologisches Institut, where he gained many contacts.