The title Baron Keith has been created three times, all for the same man. George Keith Elphinstone, a younger son of Charles Elphinstone, 10th Lord Elphinstone, was created Baron Keith in the Peerage of Ireland in 1797, and Baron Keith in the Peerage of the United Kingdom on the 15th of December 1801. He was again created Baron Keith in the United Kingdom on the 17th of September 1803, but this time with a special remainder to allow his daughter to succeed, as he had no sons. Finally, he was created Viscount Keith in the Peerage of the United Kingdom, and died on the 10th of March 1823, when the viscountcy and 1801 barony became extinct, while the 1797 and 1803 baronies passed to his daughter. These titles became extinct on her death on the 11th of November, 1867.

Barons Keith (1797 and 1803)

• George Keith Elphinstone, 1st Viscount Keith (1746-1823)
• Margaret Keith, 2nd Baroness Keith (1788-1867)

NB: There have been several other peerages created in the name of Keith: Lord Keith in the Peerage of Scotland (1587), and the United Kingdom peerages of Baron Keith of Avonholm (1953) and Baron Keith of Kinkel (1977), both under the Appellate Jurisdiction Act 1876, and Baron Keith of Castleacre (1980), under the Life Peerages Act 1958.