Knüllgebirge

thumb|right|Eisenberg.

The Knüllgebirge () or simply Knüll () is a small mountain range in the northern part of Hesse, Germany, approximately south of Kassel. Its highest peak is the Eisenberg, with an altitude of . The area is heavily forested and has a low population density compared to neighbouring regions. The principal town of the region is Schwarzenborn, with a population of 1158 (2006), which is the site of German army Jägerregiment 1 headquarters.