Viscount Bolingbroke

Viscountcy of Bolingbroke
Arms of St John: Argent, on a chief gules two mullets or
Creation date	7 July 1712
Monarch	Queen Anne
Peerage	Peerage of Great Britain
First holder	Henry St John
Present holder	Nicholas Alexander Mowbray St John, 9th Viscount Bolingbroke, 10th Viscount St John
Remainder to	the 1st Viscount's heirs male of the body lawfully begotten, with remainder, failing his own male issue, to his father and the heirs male of his body.
Subsidiary titles	Viscount St John Baron St John of Lydiard Tregoze Baron St John of Battersea St John baronets, of Lydiard Tregoze

Viscount Bolingbroke is a title in the Peerage of Great Britain. It was created in 1712 for the Hon. Henry St John. He was made Baron St John, of Lydiard Tregoze in the County of Wilts, at the same time, also in the Peerage of Great Britain. Since 1751 the titles are merged with the titles of Viscount St John and Baron St John, in the County of Surrey, both also in the Peerage of Great Britain.

John St John (died 1648) was the great-great-great-grandson of Oliver St John (died 1497) (whose elder brother Sir John St John (died c. 1488) was the ancestor of the Barons St John of Bletsoe and Earls of Bolingbroke), second son of Sir Oliver St John (died 1437), the first husband of Margaret Beauchamp, great-great-granddaughter of Roger de Beauchamp, 1st Baron Beauchamp of Bletshoe (died 1380). Margaret Beauchamp was maternal grandmother of Henry VII through her second marriage.

His uncle was Oliver St John, 1st Viscount Grandison (a title now held by the Earl of Jersey). On 22 May 1611 he was created a Baronet, of Lydiard Tregoze in the County of Wilts, in the Baronetage of England.

St John later represented Wiltshire in Parliament and was a strong supporter of King Charles I during the Civil War. His younger son, the third Baronet, represented both Wiltshire and Wootton Bassett in Parliament. His son, the fourth Baronet, also represented these constituencies in the House of Commons. In 1716 he was raised to the Peerage of Great Britain as Baron St John, in the County of Surrey, and Viscount St John, with remainder to his second and third sons, as his eldest son Henry St John had already been created Baron St John, of Lydiard Tregoze in the County of Wilts, and Viscount Bolingbroke in 1712 see below). Lord St John was succeeded according to the special remainder by his second son, the 2nd Viscount. He also represented Wootton Bassett in Parliament. In 1751 his son, the 3rd Viscount, succeeded his uncle as 2nd Viscount Bolingbroke and 2nd Baron St John according to a special remainder in the letters patent.