Sir Baynham Throckmorton, 2nd Baronet (1606– 28 May 1664), of Clearwell, Gloucestershire, supported the Royalist cause during the English Civil War and was a Member of Parliament for Gloucestershire from 1661 until his death on 28 May 1664.
Throckmorton was born about 1606 to Sir William Throckmorton, 1st Baronet (died 1628) and Cicely Baynham, daughter of Thomas Baynham (died 1611) of Clearwell, Gloucestershire by Mary Winter, daughter of Sir William Winter of Lydney.
Throckmorton received an education in law at the Inner Temple which he left in 1623. On the death of his father on 18 July 1628, he succeeded to the Throckmorton Baronetcy, aged 22.
Throckmorton was a Justice of the Peace in Gloucestershire from 1634 to 1645. He served as Chief Forester in the Forest of Dean from 1634 to 1645. This last office he held probably as a result of the location of his manor of Clearwell within the forest, which manor had previously been held by his maternal ancestor Sir Thomas Baynham (died 1500) who had been constable of St Briavel's Castle, the official residence of the forester. In 1635 with three partners he took an active part in the iron industry in the Forest of Dean after acquiring a lease in the forest from the Crown. However the venture did not prosper and two years later he was obliged to place his estates in the hands of trustees to settle his debts.
From 1642 to 1643 Throckmorton was Sheriff of Gloucestershire and at the start of the Civil War was appointed a Commissioner of Array for King Charles I. He was an active Cavalier between 1642 and 1645, holding the rank of Lieutenant-Colonel of Horse in the cavalry. He was captured by parliamentary forces and surrendered at Gloucester in December 1645. His lands were sequestrated by Parliament because they found him to be a royalist delinquent. He did not pay the fine imposed on him by the Parliamentary Committee for Compounding with Delinquents, with the result that his estate was sold to Thomas Gookin. However it is likely that this was a collusive purchase to circumvent the Parliamentary fine.