United States (Contiguous 48) is 4.6 times larger than Iran.
Area: 1,648,195 km2 World Factbook
Population: 80,840,713 (July 2014) World Factbook
Iran, also known as Persia, officially the Islamic Republic of Iran, is a country in Western Asia. Wikipedia
Area: 7,653,006 km2 Census
Population: 313,989,653 (July 2013) Census
The contiguous United States is the 48 adjoining US states plus Washington, DC on the continent of North America that are south of Canada and north of Mexico. Wikipedia