Baron Mansel, of Margam in the County of Glamorgan, was a title in the Peerage of Great Britain.
It was created on 1 January 1712 for Sir Thomas Mansel, 5th Baronet, previously Member of Parliament for Cardiff and Glamorganshire.
His ancestor had been created a Baronet, of Margam in the County of Glamorgan, in the Baronetage of England on 22 May 1611.
Following her death without issue in 1786,[2] it passed to her aunt Mary Mansell, who had married John Ivory Talbot of Lacock Abbey, Wiltshire.
On his death without issue, it passed to his elder brother's son George Child Villiers, 5th Earl of Jersey.