Fairfax Harrison (March 13, 1869 – February 2, 1938) was an American lawyer, businessman, and writer. The son of the secretary to Confederate President Jefferson Davis, Harrison studied law at Yale University and Columbia University before becoming a lawyer for the Southern Railway Company in 1896. By 1906 he was Southern's vice-president of finance, and in 1907 he helped secure funding to keep the company solvent. In 1913 he was elected president of Southern, where he instituted a number of reforms in the way the company operated.