Quadripartite Agreement, a treaty among four states or other parties, may refer to:
Quadripartite Agreement (1933), or Four-Power Pact, signed by France, Britain, Italy, and Germany Quadripartite Agreement (1947), or UKUSA Agreement, signed by the United Kingdom and the United States, and later extended to other countries, concerning cooperation in signals intelligence Quadripartite Agreement (1971), or the Four Power Agreement on Berlin, between the United States, the Soviet Union, the United Kingdom, and France Quadripartite Agreement (1991), between Argentina, Brazil, the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials, and the International Atomic Energy Agency for the application of nuclear safeguards
See also Four Power (disambiguation) Quadruple Alliance (disambiguation)