Grumbach is a municipality in Rhineland-Palatinate, Germany.
Grumbach may also refer to:
Grumbach, Bad Langensalza, a village in Thuringia, Germany Grumbach (surname) Grumbach (Innerste), a river of Lower Saxony, Germany, tributary of the Innerste Grumbach (Werra), a river of Thuringia, Germany, tributary of the Werra
See also Grumbacher, an American manufacturer of art materials