Alaska ( , Alyaska) is the largest state of the United States of America by area; it is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait. Approximately half of Alaska's 683,478 residents reside within the Anchorage metropolitan area. As of 2007, Alaska remains the least densely populated state.

The area that became Alaska was purchased from the Russian Empire after Western Union discontinued construction of its first electric telegraph line which ran from California, up the coast of North America, across the Bering Strait, continuing to Moscow and into the European telegraph network. Despite $3 million in U.S. investment for the Russian-American telegraph expedition, work ceased upon the completion of the competing Transatlantic telegraph cable. The U.S. realized the potential of continuing the line to Moscow and sent Secretary of State William H. Seward to negotiate with the Russian Ambassador to fund the remaining phases of the telegraph line. Russia did not see the potential in funding, so Alaska was offered in exchange for the value of the Russian-American telegraph. The Russians feared that if they did not sell Russian North America, it would be taken from them by the westward expansion of the United States and Canada. They tried to play one potential purchaser off against the other to start a bidding war, but were largely unsuccessful.

The U.S. Senate approved the purchase of Alaska from the Russian Empire on March 30, 1867, for $7.2 million at two cents per acre, about five cents per hectare. The land went through several administrative changes before becoming an organized territory on May 11, 1912 and the 49th state of the U.S. on January 3, 1959. The name "Alaska" was already introduced in the Russian colonial time, when it was used only for the peninsula and is derived from the Aleut alaxsxaq, meaning "the mainland" or more literally, "the object towards which the action of the sea is directed." It is also known as Alyeska, the "great land," an Aleut word derived from the same root.

Geography

main: Geography of Alaska Alaska has more coastline than all the other U.S. states combined. It is the only non-contiguous U.S. state on continental North America; about of British Columbia (Canada) separate Alaska from Washington state. Alaska is thus an exclave of the United States. It is technically part of the continental U.S., but is often not included in colloquial use; Alaska is not part of the contiguous U.S., often called "the Lower 48." The capital city, Juneau, is situated on the mainland of the North American continent but, is not connected by road to the rest of the North American highway system.

The state is bordered by the Yukon Territory and British Columbia, Canada, to the east, the Gulf of Alaska and the Pacific Ocean to the south, the Bering Sea, Bering Strait, and Chukchi Sea to the west and the Arctic Ocean to the north. Alaska's territorial waters touch Russia's territorial waters in the Bering Strait, as the Russian and Alaskan islands are only apart. As it extends into the eastern hemisphere, it is technically both the western-most and eastern-most state in the United States, as well as also being the northern-most.