U.S.-Iran relations refer to the complex diplomatic, political, and military interactions between the United States and Iran, particularly since the mid-20th century. This relationship has been marked by significant events such as the 1953 coup in Iran, the 1979 Iranian Revolution, and the Iran Hostage Crisis, which led to a severe breakdown in ties. These interactions have shaped both countries' foreign policies and have had lasting implications for regional stability in the Middle East.