John Thynne may refer to:
John Thynne (1513-1580), was the steward of Edward Seymour, 1st Duke of Somerset, and a Member of Parliament. John Thynne, 3rd Baron Carteret (1772–1849), English peer and politician John Thynne, 4th Marquess of Bath (1831-1896), Lord Lieutenant of Wiltshire and Envoy Extraordinary to Portugal and Austria John Thynne (died 1604), MP Rev. Lord John Thynne, third son of Thomas Thynne, 2nd Marquess of Bath
See also John Thynne Howe, 2nd Baron Chedworth (1714-1762)