The Office of the United States Trade Representative, or USTR, is an arm of the executive branch of the United States government that falls within the Executive Office of the President. It is responsible for the United States' international trade policy at bilateral and multilateral levels.

The head of the office holds the title of United States Trade Representative (USTR), which is a Cabinet-level position (though not technically within the Cabinet). The United States Trade Representative and Deputy United States Trade Representatives (DUSTR) carry the title of Ambassador.