John Carmichael, 3rd Earl of Hyndford PC KT (15 March 1701 – 19 July 1767), styled Viscount of Inglisberry between 1710 and 1737, was a Scottish nobleman and diplomat.
He was son of James Carmichael, 2nd Earl of Hyndford and succeeded to the earldom in 1737. He was a Scottish representative peer from 1739 and sheriff of Lanark from 1739, Lord High Commissioner to the General Assembly of the Church of Scotland in 1739 and 1740. He was appointed a Knight of the Thistle in 1742 and a Privy Counsellor in 1750. He was Vice Admiral of Scotland from 1764 to 1767.
He was envoy to Prussia from 1741–42, to Russia from 1744–49 and to Vienna from 1752-64.
He was succeeded by John Carmichael, the son of his uncle, William Carmichael of Skirling.