Sizergh Castle & Garden is a castle, stately home and garden in Sizergh, Cumbria, England, about four miles south of Kendal, and in the care of the National Trust. The Deincourt family had owned the land here since the 1170s and on the marriage of Elizabeth Deincourt to Sir William de Stirkeland in 1239, the estate passed into the hands of what became the Strickland family, who owned it until it was gifted to the National Trust in 1950. The family still inhabit the estate.