Bruno Bauch (German: [baʊχ]; January 19, 1877 in Groß-Nossen – February 27, 1942 in Jena) was a German Neo-Kantian philosopher.
Bauch was born in Groß-Nossen, Münsterberg district, Silesia (now in Poland) and studied philosophy at Strasbourg, Heidelberg and Freiburg. In 1901, he received his doctorate under Heinrich Rickert at Freiburg, which entitled him to teach some courses (one of his students was Rudolf Carnap later became a central figure of the Vienna Circle). Bauch completed his Habilitation, entitling him to a professorship, at the University of Halle in 1903. He taught as a "titular professor" at Halle from 1903 to 1910, and from 1911 onward as an "ordinary professor" at the University of Jena.
At Jena, he befriended Gottlob Frege and collaborated with the Neo-Kantian philosopher of language Richard Hönigswald. Bauch was an influential figure in the Kant-Gesellschaft (Kant Society) and helped publish the Prussian Academy's edition of Kant's collected works. Until 1916, he was editor of the Kant Society's journal, Kant-Studien (Kant Studies). He was forced to resign after publishing an anti-semitic article in a right-wing nationalist tabloid, which caused a storm of controversy in the Kant Society. (Many Neo-Kantians, including Bauch's subsequent colleague Hönigswald, were Jewish, and quite a few were social democrats.) In 1917, Bauch founded a philosophical society of his own, the German Philosophical Society, which issued the journal Beiträge zur Philosophie des Deutschen Idealismus (Contributions to the Philosophy of German Idealism). Frege was among its contributors. When the Nazis came to power, Bauch's political views stood him in good stead. While many Neo-Kantians had to emigrate and some ended up in concentration camps (including, for a year, Hönigswald), Bauch became head of the German Philosophical Society in 1934.