Burg Lindenfels, Medieval castle ruins in Lindenfels, Germany.

Burg Lindenfels is a castle ruin perched on a hilltop overlooking the town and surrounding Odenwald valleys below. The structure displays stone walls and towers that reflect different periods of medieval construction and modification.

The castle was first mentioned as Slirburc in the Lorscher Chronik between 1077 and 1088, and in 1123 it was called Burg Lindenfels. In 1277 Pfalzgraf Ludwig II bought it. Duke Eberhard VI of Württemberg died here on 17 February 1504. In 1728 the bergfried was demolished due to empty coffers, further parts followed in 1779, and in 1802 the Landgraviate of Hesse-Darmstadt took over.

The castle's original name, Schlierburg, came from the village of Schlierbach below it; the Lorscher Chronik records it as "Slirburc" between 1077 and 1088, and only in 1123 does it appear as Burg Lindenfels. Count Berthold the Younger styled himself "Count of Lindenfels", and the name passed to the town that grew beside the walls.

The ruin stands on a hill west of Lindenfels, above the village of Schlierbach, and the walk up is on foot. From the walls the view opens south over the Weschnitztal toward Fürth, Rimbach and the Tromm. The core castle is ringed by three Zwingers, the two outer ones partly built into the town wall.

The round bergfried, once standing free in the centre of the courtyard, was demolished in 1728 because the Palatine treasury was empty; a low walled marking in the courtyard shows where it stood. The castle lost its role from the late 15th century, and in 1779 further parts were pulled down.