Kleeburg, Medieval castle in Euskirchen, Germany.

Kleeburg is a moated castle near the Weidesheim district of Euskirchen, made up of a small manor house and a three-winged outer bailey, linked by a bridge. The west tower was added in 1591 and the east tower in 1594. After a fire in 1894, parts of the south wing and the whole west wing were demolished, and a large barn was built along the southern defensive wall.

The castle is documented from 1393, when Johann and Eva von Bendeman and their sister-in-law von Cleberg were named as owners. In the mid-15th century it passed to the von Dadenberg family, who added the west tower in 1591 and the east tower in 1594. In 1671 it was divided among the Gymnich von Vlatten, the Gymnich von Gymnich and the barons von Rolligen; Johanna Maria von Gymnich later reunited the three shares and, dying in 1825 as the last of her family, bequeathed the castle to Baron Ludwig Joseph Spies von Büllesheim. After a fire it was rebuilt in 1894, when parts of the south wing and the whole west wing were demolished.

The name Kleeburg refers to the noble family von Cleberg, recorded as co-owners in 1393 alongside Johann and Eva von Bendeman. The three-winged outer bailey and the bridge over the moat shape the approach to the small manor house. Since 1997 the site has served as the headquarters of a company, so the buildings are in working use rather than open as a museum.

The castle is located at Zur Kleeburg 34 in Euskirchen and can be viewed from the outside, though it remains in private ownership as a company headquarters. Visitors should understand that this is an active working property and access may be limited.

The 1894 rebuilding after a fire removed parts of the south wing and the whole west wing; a large barn was then built against the southern defensive wall, and timber-framed buildings were added to the east, now used as flats and offices. The west and east towers date from 1591 and 1594.