Isabel Cleves Dodge Sloane (February 1896 – March 16, 1962) was an American heiress and socialite who owned a major Thoroughbred horse racing stable and breeding farm. Isabel Dodge was the second of three children of Canadian-born Ivy Hawkins (1864–1901) and John F. Dodge (1864–1920), the co-founder of the Dodge Brothers Motor Company in Detroit, Michigan. Her mother died of tuberculosis when she was six and she was raised by two stepmothers and a series of nannies. Educated at Detroit's exclusive Liggett School for Girls, her family's great wealth brought her in contact with America's social elite and in 1921 she married Manhattan stockbroker, George Sloane.