Harry Ford Sinclair (July 6, 1876 in Benwood, West Virginia - November 10, 1956 in Pasadena, California) was an American industrialist, founder of Sinclair Oil. He was implicated in the 1920s Teapot Dome Scandal, and served six months in prison for jury tampering. Afterwards he returned to his former life and enjoyed its prosperity until his death.
He was an avid owner of sports properties, one of the principal financial backers of baseball's Federal League and a force in U.S. thoroughbred racing. Horses from his stable won the Kentucky Derby and three Belmont Stakes.
Harry Sinclair was born in Benwood, West Virginia, now a suburb of the city of Wheeling. Sinclair grew up in Independence, Kansas. The son of a pharmacist, after finishing high school, he entered the pharmacy department of the University of Kansas, at Lawrence. He was working as a pharmacist in 1901 when the business failed. He then began selling lumber for derricks in the oil fields of southeastern Kansas. On the side, he started speculating in oil leases. The opportunity in the rapidly expanding oil industry saw him become a lease broker and acquire an interest in the White Oil Company. In 1904, Sinclair married Elizabeth Farrell of Independence, Kansas. By the time he was thirty, he had become a millionaire.
In 1910, four Tulsa businessmen: Eugene Frank Blaise, Charles J. Wrightsman, William Connelly, and Harry F. Sinclair bought the failed Farmers National Bank in Tulsa. They created a new entity, Exchange National Bank, and named Sinclair as President. This bank, later renamed as the National Bank of Tulsa, was a forerunner of the present Bank of Oklahoma.