Erbach an der Donau (Swabian German: Ärrbach) is a town on the Danube River in Baden-Württemberg, Germany.

Located in the Alb-Donau District, Erbach lies between Ulm and Ehingen an der Donau on the southern edge of the Swabian Jura.

[3] Erbach is twinned with Wolkersdorf im Weinviertel in Austria since 1981 and Thorigny sur Marne in France since 1982.

Erbach is part of the Danube-Iller Traffic Network, in whose tariff region the South Rail between Ulm and Bad Schussenried belongs to.

The most prominent sight is the Renaissance Erbach Castle, dating from the early 16th century.