Engelbert Mühlbacher (4 October 1843 – 17 July 1903) was an Austrian historian. Born in Gresten, he received his classical education in Linz, Upper Austria being his family's home region. In 1862 he became a novice among the Austin Canons in Sankt Florian. After completing his theological studies there, he was ordained priest in 1867. As Alfred Ritter von Arneth relates in his memoirs, historical studies had been successfully cultivated at St. Florian's since Provost Arneth's time, and Mühlbacher was soon active in this domain. Among his writings are articles on St. Florian's Gerhoh von Reichersberg, and the literary productions of St. Florian's.