Westhessische Senke
Homberg lies in the transitional zone between the West Hesse Depression, a sunken area dating from the Tertiary subera, and the Knüll (or Knüllgebirge), a low mountain range. The town itself stretches over several hills underlain mainly with basalt. The river Efze flows from the Knüll through Homberg, later emptying into the river Schwalm. There exist small coal deposits in the immediate area.