阿留申群岛（英语：Aleutian Islands，可能来自楚科奇语：aliat，为岛屿的意思）于白令海与北太平洋之间，自阿拉斯加半岛向西伸延至堪察加半岛。属于阿拉斯加半岛上阿留申山脉的延伸。由超过三百个细小的火山岛（当中有57座火山）组成，长1,900公里，总面积17,666平方公里。由于横跨东经/西经180°，为美国技术上的最西及最东点。绝大部分属于美国阿拉斯加州，通常被视为阿拉斯加荒野的范围，惟极西部属俄罗斯。阿留申群岛是花彩列岛的起源，地质上位于太平洋火环北部。岛上居民为阿留申人。各岛屿之间有阿拉斯加海洋公路渡轮系统服务。

The Aleutian Islands (/əˈluːʃən/; possibly from Chukchi aliat, "island") are a chain of 14 large volcanic islands and 55 smaller ones belonging to both the United States and Russia. They form part of the Aleutian Arc in the Northern Pacific Ocean, occupying an area of 6,821 sq mi (17,666 km) and extending about 1,200 mi (1,900 km) westward from the Alaska Peninsula toward the Kamchatka Peninsula in Russia, and mark a dividing line between the Bering Sea to the north and the Pacific Ocean to the south. Crossing longitude 180°, at which point east and west longitude end, the archipelago contains both the westernmost part of the United States by longitude (Amatignak Island) and the easternmost by longitude (Semisopochnoi Island). The westernmost U.S. island in real terms, however, is Attu Island, west of which runs the International Date Line. While nearly all the archipelago is part of Alaska and is usually considered as being in the "Alaskan Bush", at the extreme western end, the small, geologically related Commander Islands belong to Russia.