Sherborne Castle (sometimes called Sherborne New Castle) is a 16th-century Tudor mansion southeast of Sherborne in Dorset, England, within the parish of Castleton. Originally built by Sir Walter Raleigh as Sherborne Lodge, and extended in the 1620s, it stands in a 1,200-acre (490 ha) park which formed a small part of the 15,000-acre (61 km2) Digby estate. Within the grounds lie the ruins of the 12th-century Sherborne Old Castle, now in the care of English Heritage.