Burg Elkerhausen, Medieval castle in Weinbach, Germany.

Burg Elkerhausen is a former water castle in the Weinbach valley, now reduced to two half-timbered houses. The east wing dates from the early 16th century; the west wing was added around 1700 at right angles. Both rest on rubble-stone bases over older cellars, with 19th-century interior alterations.

The 12th-century tower castle was expanded in the 14th century into a water castle with an outer bailey, seat of the von Elkerhausen knights, first documented in 1191 and extinct in 1725. In 1352 a peacekeeping army under Archbishop Balduin of Trier besieged the valley castle; after an Urfehde treaty was signed with the garrison's consent, it was razed, not destroyed. Some family members then built Neu-Elkerhausen on the heights by the Lahn.

The castle served as the seat of the Elkerhausen nobility and continues to shape the appearance of the village today. The settlement itself takes its name from the family that once ruled here and held economic power in the region.

The castle is private property and can be viewed from outside, but visitors should keep their distance. Posted signs mark accessible areas and indicate which sections to avoid.

From 1786 to 1843, the former fortress was repurposed as a needle factory under Prince Karl Christian's management. This industrial use shows how noble estates adapted economically to changing times.