The commune contains 6 municipalities and several villages: Historically Deggenhausertal was located in the border region between the Free Cities of Überlingen and Ravensburg, the Prince-Bishopric of Constance, Salem Abbey and the County of Heiligenberg.

By 1779 Deggenhausen, Homberg, Untersiggingen and Wittenhofen had come under the rule of the Princes of Fürstenberg; Roggenbeuren belonged to the cathedral chapter of Constance and Urnau to Salem Abbey.

In the Reichsdeputationshauptschluss of 1803, in which the principalities of the ecclesiastic rulers were dispersed to the counts and princes of the empire, Roggenbeuren and Urnau were disbursed to the Electorate of Baden.

During the formation of the Confederation of the Rhine in 1806, the principality of Fürstenberg was mediatised and the other four municipalities were also annexed by Baden.

The 6 municipalities were separate communes until 1 January 1972 when they were united to form the larger conglomerate Deggenhausertal.