John Glynn Serjeant-at-law of Glynn (1722–1779) was an English lawyer and politician who sat in the House of Commons from 1768 to 1779. Glynn was born to a family of Cornish gentry. He inherited his father's estate at Glynn in the parish of Cardinham, Cornwall, on the deaths of his elder brother and his nephew.
Glynn was admitted to the Middle Temple on 21 January 1740–1741. On 28 January 1747/8, he was called to the Bar. In 1763, Glynn became serjeant-at-law, and in the following year Recorder of Exeter. Known for his skill as a pleader, Glynn was engaged in many celebrated cases. Elected to Parliament for Middlesex in 1768, Glynn served in Parliament until his death. In 1772, he was elected Recorder of London. Glynn's speeches in Parliament were highly praised. Glynn County, Georgia was named after John Glynn[1] in recognition for his support for the cause of American independence in Parliament.