Sir Thomas Vernon (10 December 1631 – 10 February 1711) was a London merchant and director of the East India Company who served in the Parliament of England.

Vernon was baptized on 10 December 1631. He was the second son of Henry Vernon (d. 1657) of Farnham, Surrey, by Joan Winter, a daughter of John Winter of Preshaw, Corhampton.^[1] His elder brother was Sir George Vernon who succeeded to their father's estates in 1657.^[2]

The son of a Surrey gentleman, Vernon established himself as a leading Turkey trader in London. He was a member of the Levant Company in 1657, assistant from 1663 to 1670, 1684 to 1685, 1686 to 1691, 1693, 1697 to 1698, Husband from 1671 to 1683. He also served as assistant to the Royal African Company from 1672 to 1674, 1677 to 1679, and from 1682 to 1684. He was a member of the Eastland Company in 1687.^[1]

A Freeman, Haberdashers' Company in 1661, Master in 1685. He was a common councilman for London from 1676 to 1680, 1682 to 1683, 1691 to 1693, 1696, and auditor 1683 to 1684.^[1] He was elected to the Parliament of England to represent the City of London from 1690 to 1695.

Vernon was knighted on 8 March 1685.^[1]

On 13 December 1660, Vernon married Ann Weston (d. 1702), a daughter of Henry Weston of Ockham, Surrey and sister of John Weston, MP for Guildford and Surrey.^[3] Together, they had four sons, including one who predeceased him, and eight daughters. By January 1703 he had settled in Sudbury, Derbyshire, the home of his son-in-law George Vernon.^[1]

• Catherine Vernon (c. 1661–1710), who married, as his third wife, George Vernon, MP for Derby, in 1681.^[4]
• Henry Vernon (c. 1665–1691), who died unmarried.
• Thomas Vernon (1666–1726), MP for Whitchurch; he married Jane (d. 1742).^[5]
• Arabella Vernon (1670–1705),^[6] who married Sir James Rushout, 2nd Baronet, MP for Evesham, and eldest surviving son of Sir James Rushout, 1st Baronet.^[7]
• Matilda Vernon (c. 1672–1732), who married Anthony Balam. After his death, she married Sir Henry Furnese, 1st Baronet.^[8][9]
• Judith Vernon (1676–c. 1740), who married Dr. Stephen Waller of Hall Barn. After his death she married John Aislabie, Chancellor of the Exchequer under George I, in 1713.^[10]
• Sir Charles Vernon (c. 1683–1762), who became a MP for Chipping Wycombe and Ripon; he married Anne Catherine Vernon, daughter of George Vernon of Farnham.

Sir Thomas died on 10 February 1711 and the bulk of his estate, which included a lease of the rectory of Farnham, Surrey, passed to his eldest surviving son, Thomas.