Allington Castle is a stone-built moated castle in Allington, Kent, just north of Maidstone, in England. The first castle on the site was an unauthorised fortification, built during The Anarchy of the early 12th century and torn down later in the century when royal control was reasserted. It was replaced by a manor house, which was fortified with royal permission in the 13th century. Various alterations and expansions were made by successive owners over the following two centuries.