Which department is responsible for foreign affairs in the United States?

The United States Department of State is primarily responsible for managing the country's foreign affairs. This includes overseeing diplomatic relationships, negotiating treaties, and representing the United States at international organizations, such as the United Nations. The Secretary of State is a key figure in crafting and implementing U.S. foreign policy, engaging with foreign governments, and ensuring that American interests are protected abroad.

In contrast, the Department of Defense focuses on military matters and national security, while the Department of Commerce is concerned with economic growth and trade policy. The Department of the Interior manages the nation’s natural resources and public lands and does not play a direct role in foreign relations. Therefore, the State Department plays a crucial role as the lead agency in handling all issues related to foreign affairs.