Solms lies right in the Lahn valley and is nestled between the foothills of both the Taunus and Westerwald at heights from 140 to 400 m above sea level. It is about 7 km west of Wetzlar and 30 km northeast of Limburg an der Lahn.

Solms borders in the north on the community of Ehringshausen and the town of Aßlar, in the east on the town of Wetzlar, in the south on the community of Schöffengrund, and in the west on the town of Leun (all in the Lahn-Dill-Kreis).

The town consists of the following centres:

Solms had its first documentary mention in 788 in a donation document from the Lorsch Monastery. The villages that nowadays form the town of Solms belonged for centuries to the County of Solms, an independent state within the Holy Roman Empire, elevated to a county in 1223, until it was dissolved in 1806. The still existing lines of the House of Solms are the princely branches of Solms-Braunfels with their seat in Braunfels, Solms-Hohensolms-Lich with their seat in Lich and Solms-Baruth, furthermore the Counts of Solms-Laubach with their seat in Laubach, Solms-Rödelheim-Assenheim with their seat in Assenheim, Solms-Sonnewalde and Solms-Wildenfels. The Burgsolms castle at Solms, ancestral seat of the family since around 1100, was destroyed in 1384 by a coalition of nearby towns under the leadership of Wetzlar, forcing count John to move to Greifenstein castle.

...
Wikipedia