Emil Hartmann was a Danish composer of the romantic period, fourth generation of composers in the Danish Hartmann musical family.

Johan Peter Emilius Hartmann was, together with his son-in-law Niels W. Gade, the leading Danish composer of the 19th century, a period known as the Danish Golden Age. According to Alfred Einstein, he was "the real founder of the Romantic movement in Denmark and even in all Scandinavia". J.P.E. Hartmann was the third generation of composers in the Danish musical Hartmann family.