Gadegast is a village and a former municipality in Wittenberg district in Saxony-Anhalt, Germany.

In 1550, 32 men who owned property lived in the community, among them 18 gardeners who were directly under the Amt's authority.

Also at that time, Gadegast bordered on the villages of Schadewalde, Mellnitz, Zallmsdorf and Seyda.

After World War II, Gadegast was incorporated into the Province (since 1947, State) of Saxony-Anhalt from 1945 to 1952 and the Bezirk Cottbus of East Germany from 1952 to 1990.

Federal Highway (Bundesstraße) B 187 between Jessen and Wittenberg lies 11 km to the south of the community.