Baron de Saumarez, on the Island of Guernsey, is a title in the Peerage of the United Kingdom. It was created on 15 September 1831 for the prominent naval commander Admiral Sir James Saumarez, 1st Baronet. He had already been created a Baronet, of Guernsey, on 13 June 1801. Lord de Saumarez was succeeded by his eldest son James, the second Baron, a clergyman. James was succeeded by his younger brother, John, the third Baron, whose son, the fourth Baron, was a career diplomat who bought the family estate at Castel, Guernsey, from his father, the third Baron, who wished to sell it. However, by marrying an heiress, the fourth Baron also brought estates in Suffolk into the family.