Schmahl is a German surname. Notable people with the surname include:
Frederik Schmahl (born 2002), German footballer Christoph Friedrich Schmahl (1739-1814), German musical instrument maker Günter Schmahl (1936-2018), German physicist and professor Gustav Schmahl (1929-2003), German violinist and university lecturer Jeanne Schmahl (1846-1915), French feminist Julius A. Schmahl (1867-1955), American politician
See also Schmal