Iran has an area of about 1,648,195 square kilometers (636,372 square miles), making it the 17th largest country in the world by area. Compared to the United States, which has an area of approximately 9,833,517 square kilometers, Iran is about one-sixth the size of the U.S. Iran's size is roughly equivalent to the size of the U.S. state of Alaska, which is slightly larger at about 1,717,856 square kilometers. In short, Iran is slightly smaller than Alaska and about one-sixth the size of the entire United States.