The Council on Foreign Relations (CFR) is an American think tank specializing in U.S. foreign policy and international relations. Founded in 1921, it is an independent and nonpartisan nonprofit organization. CFR is based in New York City, with an additional office in Washington, D.C. Its membership has included senior politicians, numerous secretaries of state, CIA directors, bankers, lawyers, professors, corporate directors and CEOs, and senior media figures.

A think tank, or policy institute, is a research institute that performs research and advocacy concerning topics such as social policy, political strategy, economics, military, technology, and culture. Most think tanks are non-governmental organizations, but some are semi-autonomous agencies within government, and some are associated with particular political parties, businesses or the military. Think tanks are often funded by individual donations, with many also accepting government grants.