Julius Henrik Lange (19 June 1838, Vordingborg – 19 August 1896, Copenhagen) was a Danish art historian and critic.
In 1858, he began his studies at the University of Copenhagen. A few years later, he accompanied a wealthy gentleman to Italy and, while there, developed an interest in art history. In 1870, he became a lecturer at the Royal Danish Academy of Fine Arts and, a year later, transferred to the University. In 1877, he became a member of the Royal Danish Academy of Sciences and Letters.
His brother was Carl Lange, the psychologist.
He wrote about ancient and contemporary art. Some of his outstanding works were:
Collections of his letters were published in 1903 and 1904. They have recently been reprinted as Breve fra Julius Lange, Kessinger (2010)