Großholbach (or Grossholbach) is an Ortsgemeinde – a community belonging to a Verbandsgemeinde – in the Westerwaldkreis in Rhineland-Palatinate, Germany.

The community lies in the Westerwald between Koblenz and Gießen on the edge of the Nassau Nature Park.

The wavy parting is meant to stand for the Holbach, a brook that runs through the municipal area.

The oakleaf stands for the Bildches Eich, a memorial consecrated to Mary and a village landmark.

The golden sword symbolizes community patron Saint Sebastian’s martyrdom.