Baron Monson, of Burton in the County of Lincoln, is a title in the Peerage of Great Britain. It was created in 18th century for Sir John Monson, 5th Baronet. The Monson family descends from Thomas Monson, of Carleton, Lincolnshire. He sat as Member of Parliament for Lincolnshire, Castle Rising and Cricklade. On 29 June 1611 he was created a Baronet, of Carleton in the County of Lincoln, in the Baronetage of England. His eldest son, the second Baronet, fought as a Royalist during the Civil War and also represented Lincoln in the House of Commons.
He married Ursula Oxenbridge, daughter of Sir Robert Oxenbridge of Hurstbourne in Hampshire, through which marriage the manor of Broxbourne came into the Monson family. This was to be the seat of the family for many years. His eldest son, the third Baronet, also represented Lincoln in Parliament. He died childless and was succeeded by his younger brother, the fourth Baronet. He sat as a Member of Parliament for Lincoln, Heytesbury, Hertford and for Aldborough.
His son, the fifth Baronet, represented Lincoln in Parliament. In 1728 he was raised to the Peerage of Great Britain as Baron Monson, of Burton in the County of Lincoln. He later served as President of the Board of Trade. Lord Monson married Lady Margaret, youngest daughter of Lewis Watson, 1st Earl of Rockingham. Their second son the Hon. Lewis Monson succeeded to the Watson estates on the death of his cousin Thomas Watson, 3rd Earl of Rockingham, assumed the surname of Watson in lieu of Monson and was created Baron Sondes in 1760 (his great-grandson was created Earl Sondes in 1880; see this title for more information on this branch of the family). Lord Monson was succeeded by his eldest son, the second Baron. He declined the offer of an earldom in 1766.