John Contee Fairfax, 11th Lord Fairfax of Cameron (18 September 1830 – 25 September 1900) was an American man who de facto held a Scottish peerage.
John Contee Fairfax was born at Vaucluse, Virginia, the second son of Albert Fairfax (15 April 1802 – 9 May 1835) and Caroline Eliza Snowden (21 April 1812 – 28 December 1899), who were married on 7 April 1828. His elder brother was Charles S. Fairfax, 10th Lord Fairfax of Cameron.
He married Mary Brown Kirby, daughter of Col. Edward Kirby (US Army), in 1857. They had the following children:
He died at age 70 in his country home Northampton, in Prince George's County, Maryland. At the time of his death he was the only American citizen to be considered a member of the British peerage.