Gustav Lange (13 August 1830 ? 20 July 1889) was a German composer.
He was born in Schwerstedt, near Erfurt, Prussian Saxony, in 1830. He produced a large number of works, most of which were light and popular. The piano solos, Edelweiss (Op. 31), and Blumenlied (Op. 39), alternatively known as Flower Song in English, are perhaps two of his best known works today.
He died in Wernigerode in 1889.