Sir Charles Herbert Sheffield, 1st Baronet (c. 1706 – 5 September 1774) of Normanby, Lincolnshire, England, was an illegitimate son of John Sheffield, 1st Duke of Buckingham and Normanby and the first of the Sheffield baronets, and the owner of Buckingham Palace (then known as Buckingham House) who sold it to King George III.

Sheffield, baptised Charles Herbert, was an illegitimate son of John Sheffield, 1st Duke of Buckingham and Normanby, and Frances Stewart,[1] who, then or afterwards, was the wife of The Hon.

[2] Sheffield was probably born about 1706 (when his mother was[3] 22 years old, was "under the tuition of Mons.

[6] On 25 April 1741, Sheffield married Margaret Diana, daughter of General Joseph Sabine, sometime Governor of Ghent and Gibraltar.

She died on 7 January 1762, in Buckingham House, St James's Park, which shortly afterwards was sold by her husband for £21,000 to King George III.