TheHouse of Helfenstein ruled Deggingen until it went extinct in 1627. Deggingen and the town of Reichenbach im Täle were annexed by theKingdom of Württemberg when, in 1806, the Lordship of Wiesensteig wasmediatized to them. The two towns were assigned toOberamt Wiesensteig [de] until 1810, when they were reassigned toOberamt Göppingen [de]. That district was reorganized as Landkreis Göppingen, which retained Deggingen and Reichenbach im Täle. The two towns expanded dramatically afterWorld 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 twoabandoned villages found in the municipal area: Bogenweiler and Gerenberg. Deggingen is in anmutually-beneficial municipal association [de] with the municipality ofBad Ditzenbach.[3]
The municipalcoat of arms of Deggingen displays the head of an elephant, inwhite, above ayellow, six-pointed star, upon afield ofred. The elephant is taken from the coat of arms of the County of Helfenstein, as was the red-yellowtincture, 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 theFederal Ministry of the Interior on 30 June 1959.[3]