Walter Carey (also spelt 'Cary') FRS (17 October 1685 – 27 April 1757) was a British MP and administrator.
He was born the eldest son of Walter Carey of Everton, Bedfordshire and educated at New College, Oxford (1704). He succeeded his father in 1714.
He was an extraordinary Clerk of the Privy Council from 1717 to 1729 and Clerk of the Privy Council in ordinary from 1729 to his death. He was surveyor general to the Prince of Wales (1723–25), Warden of the Mint (1725–27) and a Lord of Trade (1727–30).
He was a Member of Parliament in the Parliament of Great Britain for Helston from 1722 to 1727 and for Dartmouth from 1727 to 1757. He was also a Member of the Parliament of Ireland for Clogher from 1731 to 1757 and Chief Secretary to the Duke of Dorset as Lord Lieutenant of Ireland from 1730 to 1737.
In 1727 he was elected a Fellow of the Royal Society. He was a Clerk of the Green Cloth from 1738 to his death.
He died in 1857. He had married twice: firstly Elizabeth, the daughter of Anthony Stuart, MP, of London and widow of John Jeffreys, MP and secondly Elizabeth, the daughter and coheiress of Anthony Collins of Baddow Hall, Essex. He had no children of his own with either wife.