网页The United States is a federal republic of fifty states, a federal district, and several territories. [16] [17] [18] The land area of the contiguous United States is 2,959,064 square miles (7,663,941 km 2).Alaska, separated from the contiguous United States by Canada, is the largest state at 663,268 square miles (1,717,856 km 2).Hawaii, occupying an archipelago …