This dissertation is an examination of the American oil industry in Saudi Arabia and its influence on United States foreign policy. The study examines the Americans who went to Saudi Arabia, the effect of the oil companies on Saudi- American relations, and the American government's response to oil company actions. There is an attempt to answer such questions as: Did the oil companies exert pressure on the American government to influence governmental policy? How effective was this pressure? And, what benefits did the oil companies have from their relationship with the government? The study concludes that Aramco was instrumental in bringing official and nonofficial contact and representation between Saudi Arabia and the United States. Moreover, Aramco was instrumental in involving the American government directly in Saudi Arabia through the extension of lend-lease aid to that country. American government involvement thwarted potential British ambitions in the Saudi oil resources and resulted in the American dominance of oil interests in that kingdom. In addition, Senate investigations showed that the oil companies grossly overcharged the United States Navy on oil purchases and that the financial assistance to Saudi Arabia was made for the protection of Aramco's oil concession.