The Rhünda (German pronunciation: [ˈrhʏnda]), also called the Rhündabach, is a 12.9 kilometres (8.0 mi) long, eastern tributary of the River Schwalm in the Schwalm-Eder-Kreis, North Hesse, Germany.

Its source is in the village of Dickershausen, part of the town of Homberg (Efze), at 327.5 metres (1,074 ft) above sea level.

Initially the Rhünda flows northeastward through Sipperhausen and then after turns away from the Stöpplingskopf, towards north-northwest.

The river meets a small stream close to Hilgershausen then flows southwest down to Helmshausen.

After passing a mill, and two basalt quarries, the Rhünda reaches the Felsberg district of Rhünda, after it crosses under Bundesstraße 253, just before reaching the Main–Weser Railway at about 159 metres (522 ft) above sea level.