The Specially Designated Nationals and Blocked Persons List, also known as the SDN List, is a United States government sanctions/embargo measure targeting U.S.-designated terrorists, officials and beneficiaries of certain authoritarian regimes, and international criminals (e.g. drug traffickers).

A Specially Designated Global Terrorist is a person or entity that has been designated as such by the United States Department of State or the U.S. Department of the Treasury.

A Specially Designated Terrorist is a person who has been designated by the U.S. Secretary of the Treasury to be a specially designated terrorist under notices or regulations issued by the Office of Foreign Assets Control, under the U.S. Treasury Department.