Grebenau () is a town in the Vogelsbergkreis in Hesse, Germany.
Lying from 220 to 350 m above sea level, Grebenau is northeast of the Vogelsberg some 26 km northwest of Fulda, at the place where the Schwarza empties into the Jossa, itself a tributary to the Fulda.
Grebenau borders in the north on the town of Alsfeld and the municipality of Breitenbach am Herzberg (Hersfeld-Rotenburg), in the east on the town of Schlitz, in the south on the town of Lauterbach, and in the west on the municipality of Schwalmtal, Hesse.
Chairman:
Herbert Appel (SPD)
(as of municipal elections held on 26 March 2006)