There have been four baronetcies created for members of the Thorold (pronounced "Thurrald", though the late Revd. Henry Croyland Thorold was insistent on the pronunciation "Thorough") family of Lincolnshire, two in the Baronetage of England and two in the Baronetage of Great Britain. As of 2014 one creation is extant.
The Thorold Baronetcy, of Marston in the County of Lincoln, was created in the Baronetage of England on 24 August 1642 for William Thorold. He fought as a Royalist in the Civil War and represented Grantham in the House of Commons after the Restoration. The fourth Baronet sat as Member of Parliament for Grantham and Lincolnshire. The ninth Baronet was Member of Parliament for Lincolnshire. The tenth Baronet was a noted book collector. The twelfth Baronet represented Grantham in Parliament. The fifteenth Baronet was a Captain in the Royal Navy and leader of the Lincolnshire County Council. As of 28 February 2014 the present Baronet has not successfully proven his succession and is therefore not on the Official Roll of the Baronetage, with the baronetcy considered dormant since 1999.
The family first came to Marston through the marriage of Sir Richard Thorold with the heiress of the de Marston family in the middle of the fourteenth century, in the middle of the fourteenth century, The Right Reverend Anthony Wilson Thorold, son of Reverend Edward Thorold, fourth son of the ninth Baronet, was Bishop of Rochester and Bishop of Winchester.