United Nations sign at the United Nations Office at Geneva (Switzerland).

The following outline is provided as an overview of and topical guide to the United Nations:

United Nations – international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and achievement of world peace. The UN was founded in 1945 after World War II to replace the League of Nations, to stop wars between countries, and to provide a platform for dialogue. It contains multiple subsidiary organizations to carry out its missions.

Legal foundation: The United Nations Charter