Since 1979, the United States has instituted sanctions against Iran in retaliation for the seizure of the U.S. Embassy and its staff, support of international terrorism, role in the Beirut Marine Corps barracks bombing, and its attacks on vessels during the 1984-1987 Tanker War.
These sanctions attempt to isolate Iran from the international banking and finance system, reduce Iran’s exports, and prevent investment in Iran’s oil and natural gas sector.
Below is a fact sheet listing of the 15 most significant sanctions and actions against Iran.
You can also download the fact sheet here
More about Iran can be found here