The Castle of Turégano (Castillo de Turégano) is an ancient fortress located in the town of Turégano in the province of Segovia, Spain. The castle was founded on the site of a pre-existing fortress. Its structure is integrated into the adjacent church of San Miguel.
In 1585 the castle was used to imprison Antonio Pérez, the then-disgraced secretary of kingPhilip II. An attempt to free him from captivity here failed.