Crossing longitude 180 Â , they are the furthest West part of the United States Nearly all the islands are part of Alaska but at the extreme western end are the Commander Islands which are in Russia . Crossing longitude 180 Â , they are the westernmost part of the United States ( and by one definition the easternmost ; see Extreme points of the United States ) . Nearly all the archipelago is part of Alaska and usually considered as being in the `` Alaskan Bush '' , but at the extreme western end the small , geologically-related , and remote Commander Islands are in Russia .