Is holkham hall a national trust?

Holkham Hall is not a National Trust property; it is owned by the Earls of Leicester and is operated by the Holkham Estate. While it is open to the public and offers tours of its impressive architecture and grounds, it is managed independently rather than being part of the National Trust. Visitors can enjoy its extensive parkland and nearby beach, but access to Holkham Hall itself is through the estate.