Eltz Castle (German: Burg Eltz) is a medieval castle nestled in the hills above the Moselle between Koblenz and Trier, Germany. It is still owned by a branch of House of Eltz who have lived there since the 12th century. Eltz Castle along with Bürresheim Castle and Lissingen Castle are the only castles in the Eifel region which have never been destroyed.

The castle stands on a 70-metre-high (230 ft) rock spur that is bounded on three sides by the river Elzbach, a tributary on the north side of the Moselle. The surrounding Eltz Forest has been declared a nature reserve by Flora-Fauna-Habitat and Natura 2000.