Max Britzelmayr (January 7, 1839 – December 6, 1909) was a German mycologist and lichenologist who was a native of Augsburg.
He spent his career as a schoolteacher and Kreisschulinspektor (school district administrator) in Augsburg. He is known for his research of a class of fungi known as Hymenomycetes. He also conducted investigations of lichens native to southern Bavaria, including the Allgäu Alps.