In addition to the 50 states and federal district, the United States has control over 14 territories. Five of them (American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands) have a permanent, nonmilitary population, while nine of them (the United States Minor Outlying Islands) do not. With the exception of Navassa Island, Puerto Rico, and the U.S. Virgin Islands, which are located in the Caribbean, all territories are located in the Pacific Ocean. One territory, Palmyra Atoll, is considered to be incorporated, meaning the full body of the Constitution has been applied to it; the other territories are unincorporated, meaning the Constitution does not fully apply to them. Ten territories (the Minor Outlying Islands and American Samoa) are considered to be unorganized, meaning they have not had an Organic Act enacted by Congress; the four other territories are organized, meaning they have had an Organic Act that has been enacted by Congress. The five inhabited territories each have limited autonomy in addition to having territorial legislatures and governors, but residents cannot vote in federal elections.
Out of the 50 states, California is the most populous, with an estimated 38,332,521 residents as of 2013; Wyoming is the least populous, with an estimated 582,658 residents. The District of Columbia, with an estimated 646,449 residents as of 2012, has a higher population than the two least populous states (Wyoming and Vermont). The largest state by area is Alaska, encompassing 665,384 square miles (1,723,337 square kilometers), while the smallest is Rhode Island, encompassing 1,545 square miles (4,002 square kilometers). The first state to ratify the current Constitution was Delaware, which it did on December 7, 1787, while the newest state is Hawaii, which was admitted to the Union on August 21, 1959. The largest territory in terms of both population and size is Puerto Rico, with 3,725,789 residents as of the 2010 Census and a total area of 5,325 square miles (13,792 square kilometers).
A map showing the location of each territory controlled by the United States. The United States is marked in blue, inhabited territories are marked in green, and uninhabited territories are marked in orange.
^Although Palmyra Atoll lacks a permanent, indigenous population, between four and 20 nature conservatory employees, United States Fish and Wildlife Service staff and researchers live on the island at any given time.
^Although Wake Island lacks a permanent, indigenous population, the island is populated by around 150 military and civilian contractors, who staff the Wake Island Airfield as well as communications facilities.