Thomas Thynne, Viscount Weymouth (1796 – 16 January 1837) was an English nobleman, Member of Parliament for Weobley from 1818 to 1820.
He was the eldest son of Thomas Thynne, 2nd Marquess of Bath and his wife Isabella Elizabeth Byng, daughter of George Byng, 4th Viscount Torrington; he held a courtesy title, and since he predeceased his father, it was lifelong.
[1][3][4] Weymouth did not stand again in the 1820 United Kingdom general election, by that time having clashed with his father over his friends and heavy debts.
Lord John Thynne, his uncle, and the lawyer Henry Broughton, managed a reconciliation in February 1820, between the death of George III and the election it triggered, but it was only temporary.
He died on 16 January 1837, as a tenant at Shanks House, Cucklington on the Somerset–Dorset boundary, at age 40, five weeks before the Marquess.
George Robbins, who was English chaplain in Florence, is given in Alumni Oxonienses as son of "William, of West Bromwich, co. Stafford, gent."