雅格斯特河是德国的河流，位于巴登－符腾堡州，属于内卡河的右支流，河道全长189公里，平均流量每秒18.6立方米，发源自埃尔万根以东，流经克赖尔斯海姆、亚格斯特河畔基希贝格、兰根堡、克劳泰姆、默克米赫尔、诺伊德瑙，河口处在巴德温普芬。

The Jagst (German pronunciation:[ˈjakst]) is a right tributary of the Neckar in northern Baden-Württemberg. It is 189 km long. Its source is in the hills east of Ellwangen, close to the Bavarian border. It winds through the towns Ellwangen, Crailsheim, Kirchberg an der Jagst, Langenburg, Krautheim, Möckmühl and Neudenau. Near Bad Wimpfen the Jagst flows into the Neckar, a few km downstream from the mouth of the river Kocher, that flows more or less parallel to the Jagst.