Julius Assmann was a Glashütte watch manufacturer.

Julius Assmann as one of the pioneers of the watch industry is closely linked with the Glashütte watches history. He was was born in Stettin on 2 October 1827 and there he learned the craft of watchmaking. He gained further knowledge at Berlin chronometer makers before he worked from 1850 at Ferdinand Adolph Lange in whose company A. Lange, Dresden. 1852, on the advice of Lange he opened a watch manufacture in Glashütte, the J. Assmann/Glashütte i.SA, Deutsche Anker-Uhren-Fabrik.

Assmann in 1853 he married the sister of the Dresden master watchmaker Adolf Schneider, Emilie Auguste Schneider. From this marriage comes his son Paul. After the death of his first wife, in 1865 he married the daughter Marie of Ferdinand Adolph Lange and so became his son in law.

Julius Assmann contributed to the establishment of the German Watchmaker School Glashütte in Glashütte and in 1885 was elected its chairman. He died a year later, on August 15, 1886.

In honor of the merits of Assmann and as a demonstration of their own excellence Glashütte Original launched the Assmann Edition, a series of limited and expensive luxury models, coveted among watch collectors.

• Das große Uhrenlexikon; Author Fritz von Osterhausen; ISBN 3898804305