The Eichelbach is a river of Hesse, Germany. It is a tributary of the Nidda, long.
The Eichelbach has its source in Vogelsberg, north of the Hoherodskopfes and east of the town Schotten-Breungeshain. It discharges into the Nidda river at the town of Nidda. Since the summer of 2009 a retention basin is being built upstream from Eichelsdorf by the Nidda water board, with a capacity of , to protect the villages on the Eichelbach and the Nidda.
The Eichelbach flows through the following villages:
The water quality of the Eichelback is deemed good.