The House of Helfenstein ruled Deggingen until it went extinct in 1627. Deggingen and the town of Reichenbach im Täle were annexed by the Kingdom of Württemberg when, in 1806, the Lordship of Wiesensteig was mediatized to them. The two towns were assigned to Oberamt Wiesensteig [de] until 1810, when they were reassigned to Oberamt Göppingen [de]. That district was reorganized as Landkreis Göppingen, which retained Deggingen and Reichenbach im Täle. The two towns expanded dramatically after World War II, though Reichenbach im Täle's growth tapered off by the end of the 1960s. Reichenbach im Täle was incorporated into Denningen in 1975.[3]
Deggingen has two boroughs (Ortsteile), Deggingen and Reichenbach im Täle, and five villages: Ave Maria, Berneck, Bierkeller, Gairen, and Nordalb. There are two abandoned villages found in the municipal area: Bogenweiler and Gerenberg. Deggingen is in an mutually-beneficial municipal association [de] with the municipality of Bad Ditzenbach.[3]
Coat of arms
The municipal coat of arms of Deggingen displays the head of an elephant, in white, above a yellow, six-pointed star, upon a field of red. The elephant is taken from the coat of arms of the County of Helfenstein, as was the red-yellow tincture, while the six-pointed star has been a symbol of Deggingen since 1551. This coat of arms was approved and a municipal flag issued by the Federal Ministry of the Interior on 30 June 1959.[3]
