In purely geographic terms, the easternmost and westernmost points in the United States are actually only 67 miles apart. The westernmost point, with a longitude of 179º6’W, is a point on Amatignak Island in Alaska. The easternmost point, with a longitude of 179º46’E is Semisopochnoi Island, also in Alaska. Both are part of the Aleutian Island chain that straddles the 180th meridian, technically putting a chunk of it in the Eastern hemisphere. Amatignak also happens to boast the southernmost point in the state of Alaska.