Ershausen/Geismar is a municipal association (German: Verwaltungsgemeinschaft) in the district of Eichsfeld, in Thuringia, Germany. The seat of the municipal association is in Schimberg.

The association consists of the following municipalities:

  1. Dieterode
  2. Geismar
  3. Kella
  4. Krombach
  5. Pfaffschwende
  6. Schimberg
  7. Schwobfeld
  8. Sickerode
  9. Volkerode
  10. Wiesenfeld

Coordinates: 51°15′N 10°10′E / 51.250°N 10.167°E / 51.250; 10.167