A medieval fortress in the village of Dirleton, East Lothian, Scotland. It lies around 2 miles (3.2 km) west of North Berwick, and around 19 miles (31 km) east of Edinburgh. The oldest parts of the castle date to the 13th century, and it was abandoned by the end of the 17th century.

Begun in around 1240 by John De Vaux, the castle was heavily damaged during the Wars of Scottish Independence, when it was twice taken by the English. In the 14th century, Dirleton was repaired by the Haliburton family, and it was acquired by the Ruthvens in 1505. The Ruthvens were involved in several plots against Mary, Queen of Scots, and King James VI, and eventually forfeited the castle in 1600. Dirleton ceased to be a residence, although Oliver Cromwell was forced to besiege the castle to flush out a band of "mosstroopers" (marauders), during the Third English Civil War in 1650. The damaged castle was then acquired by John Nisbet, Lord Dirleton, who decided to build a new country house on the nearby Archerfield Estate. The Nisbet family of Dirleton continued to maintain the castle's gardens, before handing Dirleton into state care in 1923.