| English Name | Aleut Name | Island Chain | Island Subgroup | Area (sq mi) | Population | Coordinates | Political Subdivision | Notes |
| Adak Island | Adaax | Andreanof Islands | | 274.6 | 45 | 51°46′51″N 176°38′45″W / 51.78083°N 176.64583°W / 51.78083; -176.64583 | Aleutians West Census Area, Alaska, US | |
| Adugak Island | Adugax̂ | Fox Islands | | 0.3 | | 52°54′17″N 169°10′28″W / 52.90472°N 169.17444°W / 52.90472; -169.17444 | Aleutians West Census Area, Alaska, US | Rookery for endangered Steller sea lion |
| Agattu Island | Angatux̂ | Near Islands | | 89.7 | 0 | 52°26′07″N 173°34′32″E / 52.43528°N 173.57556°E / 52.43528; 173.57556 | Aleutians West Census Area, Alaska, US | |
| Aiktak Island | Ugangax | Fox Islands | Krenitzin Islands | 0.5 | 0 | 54°11′01″N 164°49′41″W / 54.18361°N 164.82806°W / 54.18361; -164.82806 | Aleutians East Census Area, Alaska, US | |
| Akun Island | Akungan | Fox Islands | | 64.4 | 0 | 54°11′18″N 165°31′43″W / 54.18833°N 165.52861°W / 54.18833; -165.52861 | Aleutians East Census Area, Alaska, US | |
| Akutan Island | Akutanax̂ | Fox Islands | | 129.0 | 1,027 | 54°07′41″N 165°55′05″W / 54.12806°N 165.91806°W / 54.12806; -165.91806 | Aleutians East Census Area, Alaska, US | |
| Alaid Island | Igingiinax̂ | Near Islands | Semichi Islands | 2.8 | | 52°45′46″N 173°53′53″E / 52.76278°N 173.89806°E / 52.76278; 173.89806 | Aleutians West Census Area, Alaska, US | |
| Amak Island | Amax | Fox Islands | | 5.8 | 0 | 55°25′06″N 163°08′38″W / 55.41833°N 163.14389°W / 55.41833; -163.14389 | Aleutians East Census Area, Alaska, US | |
| Amaknak Island | Amaxnax̂ | Fox Islands | | 3.3 | 2,524 | 53°54′37″N 166°32′12″W / 53.91028°N 166.53667°W / 53.91028; -166.53667 | Aleutians West Census Area, Alaska, US | |
| Amatignak Island | Amatignax̂ | Andreanof Islands | Delarof Islands | 13.1 | 0 | 51°15′44″N 179°06′31″W / 51.26222°N 179.10861°W / 51.26222; -179.10861 | Aleutians West Census Area, Alaska, US | The southernmost point of Alaska |
| Amchitka Island | Amchixtax̂ | Rat Islands | | 116.0 | 0 | 51°32′32″N 178°59′00″E / 51.54222°N 178.98333°E / 51.54222; 178.98333 | Aleutians West Census Area, Alaska, US | Site of underground nuclear weapons tests |
| Amlia Island | Amlax | Andreanof Islands | | 180.0 | | 52°05′08″N 173°32′56″W / 52.08556°N 173.54889°W / 52.08556; -173.54889 | Aleutians West Census Area, Alaska, US | |
| Amukta Island | Amuux̂tax̂ | Islands of Four Mountains | | 19.8 | | 52°29′10″N 171°15′08″W / 52.48611°N 171.25222°W / 52.48611; -171.25222 | Aleutians West Census Area, Alaska, US | |
| Anagaksik Island | Anagaxsax̂ | Andreanof Islands | | 0.2 | | 51°51′03″N 175°53′31″W / 51.85083°N 175.89194°W / 51.85083; -175.89194 | Aleutians West Census Area, Alaska, US | |
| Anangula Island | | Fox Islands | | 0.6 | | 53°00′02″N 168°54′40″W / 53.00056°N 168.91111°W / 53.00056; -168.91111 | Aleutians West Census Area, Alaska, US | Also known as Ananiuliak Island |
| Anglamax | | Andreanof Islands | | 0.3 | | 51°44′08″N 176°30′55″W / 51.73556°N 176.51528°W / 51.73556; -176.51528 | Aleutians West Census Area, Alaska, US | |
| Argonne Island | | Andreanof Islands | | 0.2 | | 51°48′16″N 176°47′20″W / 51.80444°N 176.78889°W / 51.80444; -176.78889 | Aleutians West Census Area, Alaska, US | |
| Asuksak Island | Hasux̂sax̂ | Andreanof Islands | | 0.5 | | 51°56′02″N 176°05′32″W / 51.93389°N 176.09222°W / 51.93389; -176.09222 | Aleutians West Census Area, Alaska, US | |
| Atka Island | Atx̂ax̂ | Andreanof Islands | | 404.6 | 95 | 52°08′17″N 174°26′43″W / 52.13806°N 174.44528°W / 52.13806; -174.44528 | Aleutians West Census Area, Alaska, US | |
| Attu Island | Atan | Near Islands | | 344.7 | 0 | 52°54′09″N 172°54′34″E / 52.90250°N 172.90944°E / 52.90250; 172.90944 | Aleutians West Census Area, Alaska, US | Largest unpopulated island in the United States, occupied by Japan during World War II |
| Avatanak Island | Agutanax̂ | Fox Islands | Krenitzin Islands | 13.8 | 0 | 54°04′18″N 165°18′14″W / 54.07167°N 165.30389°W / 54.07167; -165.30389 | Aleutians East Census Area, Alaska, US | |
| Aziak Island | Haazax | Andreanof Islands | | 0.6 | 0 | 51°57′02″N 176°09′23″W / 51.95056°N 176.15639°W / 51.95056; -176.15639 | Aleutians West Census Area, Alaska, US | |
| Bering Island (Russian: остров Беринга) | | Commander Islands | | 1,036.0 | 676 | 55°00′03″N 166°16′23″E / 55.00083°N 166.27306°E / 55.00083; 166.27306 | Aleutsky District, Kamchatka Krai, RU | The only inhabited island in the Aleutsky District |
| Bird Island | Kitnamax | Fox Islands | | 0.1 | | 54°40′03″N 163°17′22″W / 54.66750°N 163.28944°W / 54.66750; -163.28944 | Aleutians East Census Area, Alaska, US | |
| Bird Rock | | Rat Islands | | 0.1 | | 51°39′38″N 178°38′14″E / 51.66056°N 178.63722°E / 51.66056; 178.63722 | Aleutians West Census Area, Alaska, US | |
| Bobrof Island | Walĝa | Andreanof Islands | | 3.0 | | 51°54′30″N 177°26′20″W / 51.90833°N 177.43889°W / 51.90833; -177.43889 | Aleutians West Census Area, Alaska, US | |
| Bogoslof Island | Aĝasaaĝux̂ | Fox Islands | | 0.5 | 0 | 53°55′38″N 168°02′04″W / 53.92722°N 168.03444°W / 53.92722; -168.03444 | Aleutians West Census Area, Alaska, US | Sanctuary for sea lions and nesting marine birds |
| Bolshoi Island | Tanax̂ Angunax̂ | Andreanof Islands | | 0.3 | | 52°11′47″N 174°10′43″W / 52.19639°N 174.17861°W / 52.19639; -174.17861 | Aleutians West Census Area, Alaska, US | |
| Buck Island | Ukdax̂sxix | Fox Islands | | 0.1 | | 53°28′39″N 167°11′55″W / 53.47750°N 167.19861°W / 53.47750; -167.19861 | Aleutians West Census Area, Alaska, US | |
| Buldir Island | Idmaax | N/A | | 7.5 | 0 | 52°21′29″N 175°55′29″E / 52.35806°N 175.92472°E / 52.35806; 175.92472 | Aleutians West Census Area, Alaska, US | |
| Carlisle Island | Kigalĝa | Islands of Four Mountains | | 16.7 | | 52°53′38″N 170°03′15″W / 52.89389°N 170.05417°W / 52.89389; -170.05417 | Aleutians West Census Area, Alaska, US | |
| Caton Island | Qagan Unimgix̂ | Fox Islands | Sanak Islands | 7.4 | | 54°23′42″N 162°26′02″W / 54.39500°N 162.43389°W / 54.39500; -162.43389 | Aleutians East Census Area, Alaska, US | |
| Chagulak Island | Chugaaĝinax̂ | Islands of Four Mountains | | 3.7 | 0 | 52°34′20″N 171°08′29″W / 52.57222°N 171.14139°W / 52.57222; -171.14139 | Aleutians West Census Area, Alaska, US | |
| Chisak Island | Hatmax | Andreanof Islands | | 0.2 | | 51°47′41″N 176°08′28″W / 51.79472°N 176.14111°W / 51.79472; -176.14111 | Aleutians West Census Area, Alaska, US | |
| Chuginadak Island | Tanax̂ Angunax̂ | Islands of Four Mountains | | 64.0 | 0 | 52°50′41″N 169°49′05″W / 52.84472°N 169.81806°W / 52.84472; -169.81806 | Aleutians West Census Area, Alaska, US | |
| Chugul Island | Chiĝulax̂ | Andreanof Islands | | 6.6 | | 51°56′37″N 175°49′14″W / 51.94361°N 175.82056°W / 51.94361; -175.82056 | Aleutians West Census Area, Alaska, US | |
| Crone Island | | Andreanof Islands | | 0.4 | | 51°40′20″N 176°38′05″W / 51.67222°N 176.63472°W / 51.67222; -176.63472 | Aleutians West Census Area, Alaska, US | |
| Davidof Island | Qanan-tanax | Rat Islands | | 1.3 | | 51°57′36″N 178°20′03″E / 51.96000°N 178.33417°E / 51.96000; 178.33417 | Aleutians West Census Area, Alaska, US | |
| Deer Island | Animin | Fox Islands | | 58.6 | 0 | 54°54′43″N 162°19′34″W / 54.91194°N 162.32611°W / 54.91194; -162.32611 | Aleutians East Census Area, Alaska, US | |
| Dora Island | | Andreanof Islands | | 0.5 | | 51°48′43″N 176°47′30″W / 51.81194°N 176.79167°W / 51.81194; -176.79167 | Aleutians West Census Area, Alaska, US | |
| Egg Island | Ugalĝa | Fox Islands | | 0.5 | 0 | 53°51′46″N 166°02′38″W / 53.86278°N 166.04389°W / 53.86278; -166.04389 | Aleutians West Census Area, Alaska, US | One of two different islands named Egg Island |
| Egg Island | Alim-tanaa | Andreanof Islands | | 0.2 | | 52°10′30″N 174°26′36″W / 52.17500°N 174.44333°W / 52.17500; -174.44333 | Aleutians West Census Area, Alaska, US | One of two different islands named Egg Island |
| Elf Island | | Andreanof Islands | | 1.2 | | 51°42′30″N 176°31′59″W / 51.70833°N 176.53306°W / 51.70833; -176.53306 | Aleutians West Census Area, Alaska, US | |
| Emerald Island | | Fox Islands | | 0.2 | | 53°17′20″N 167°51′29″W / 53.28889°N 167.85806°W / 53.28889; -167.85806 | Aleutians West Census Area, Alaska, US | |
| Gareloi Island | Anangusix̂ | Andreanof Islands | Delarof Islands | 26.0 | 0 | 51°47′09″N 178°47′56″W / 51.78583°N 178.79889°W / 51.78583; -178.79889 | Aleutians West Census Area, Alaska, US | |
| Great Sitkin Island | Stitxinax̂̂ | Andreanof Islands | | 60.0 | | 52°03′29″N 176°07′10″W / 52.05806°N 176.11944°W / 52.05806; -176.11944 | Aleutians West Census Area, Alaska, US | |
| Gull Island | | Fox Islands | | 0.1 | | 53°40′07″N 166°49′03″W / 53.66861°N 166.81750°W / 53.66861; -166.81750 | Aleutians West Census Area, Alaska, US | |
| Hawadax Island | Hawadax | Rat Islands | | 10.7 | | 51°48′09″N 178°17′51″E / 51.80250°N 178.29750°E / 51.80250; 178.29750 | Aleutians West Census Area, Alaska, US | |
| Herbert Island | Chiĝulax | Islands of Four Mountains | | 21.0 | | 52°45′11″N 170°07′10″W / 52.75306°N 170.11944°W / 52.75306; -170.11944 | Aleutians West Census Area, Alaska, US | |
| Hog Island | Uknadax | Fox Islands | | 0.2 | | 53°54′13″N 166°34′25″W / 53.90361°N 166.57361°W / 53.90361; -166.57361 | Aleutians West Census Area, Alaska, US | |
| Igitkin Island | Igitxix̂ | Andreanof Islands | | 8.2 | | 51°58′55″N 175°53′44″W / 51.98194°N 175.89556°W / 51.98194; -175.89556 | Aleutians West Census Area, Alaska, US | |
| Ikiginak Island | Ikiiĝinax̂ | Andreanof Islands | | 0.2 | | 51°58′39″N 175°29′28″W / 51.97750°N 175.49111°W / 51.97750; -175.49111 | Aleutians West Census Area, Alaska, US | |
| Ilak Island | Iilax̂ | Andreanof Islands | Delarof Islands | 0.5 | 0 | 51°28′40″N 178°17′14″W / 51.47778°N 178.28722°W / 51.47778; -178.28722 | Aleutians West Census Area, Alaska, US | |
| Kagalaska Island | Qigalaxsix̂ | Andreanof Islands | | 44.9 | | 51°48′06″N 176°21′28″W / 51.80167°N 176.35778°W / 51.80167; -176.35778 | Aleutians West Census Area, Alaska, US | |
| Kagamil Island | Qagaamila | Islands of Four Mountains | | 16.8 | | 52°59′35″N 169°42′43″W / 52.99306°N 169.71194°W / 52.99306; -169.71194 | Aleutians West Census Area, Alaska, US | |
| Kaligagan Island | Qisxagan | Fox Islands | Krenitzin Islands | 0.3 | 0 | 54°08′33″N 164°54′49″W / 54.14250°N 164.91361°W / 54.14250; -164.91361 | Aleutians East Census Area, Alaska, US | |
| Kanaga Island | Kanaga | Andreanof Islands | | 142.0 | | 51°44′21″N 177°26′38″W / 51.73917°N 177.44389°W / 51.73917; -177.44389 | Aleutians West Census Area, Alaska, US | |
| Kanu Island | Yunax̂ | Andreanof Islands | | 1.4 | | 51°56′28″N 176°02′37″W / 51.94111°N 176.04361°W / 51.94111; -176.04361 | Aleutians West Census Area, Alaska, US | |
| Kasatochi Island | Qanan-tanax | Andreanof Islands | | 2.0 | 0 | 52°10′17″N 175°31′06″W / 52.17139°N 175.51833°W / 52.17139; -175.51833 | Aleutians West Census Area, Alaska, US | |
| Kavalga Island | Qawalĝa | Andreanof Islands | Delarof Islands | 5.6 | 0 | 51°33′19″N 178°48′07″E / 51.55528°N 178.80194°E / 51.55528; 178.80194 | Aleutians West Census Area, Alaska, US | |
| Khvostof Island | Atanax̂ | Rat Islands | | 0.9 | | 51°58′50″N 178°16′36″E / 51.98056°N 178.27667°E / 51.98056; 178.27667 | Aleutians West Census Area, Alaska, US | |
| Kigul Island | Kiigalux̂ | Fox Islands | | 0.2 | | 53°02′49″N 168°26′43″W / 53.04694°N 168.44528°W / 53.04694; -168.44528 | Aleutians West Census Area, Alaska, US | |
| Kiska Island | Qisxa | Rat Islands | | 107.2 | 0 | 51°57′51″N 177°27′36″E / 51.96417°N 177.46000°E / 51.96417; 177.46000 | Aleutians West Census Area, Alaska, US | Occupied by Japan during World War II |
| Koniuji Island | Tanĝimax | Andreanof Islands | | 0.4 | 0 | 51°59′16″N 176°35′30″W / 51.98778°N 176.59167°W / 51.98778; -176.59167 | Aleutians West Census Area, Alaska, US | |
| Kudiakof Islands | | Fox Islands | | 4.5 | | 55°20′58″N 162°52′16″W / 55.34944°N 162.87111°W / 55.34944; -162.87111 | Aleutians East Census Area, Alaska, US | Two barrier islands outlining the Izembek Lagoon |
| Little Kiska Island | Kangxhix̂ | Rat Islands | | 2.9 | | 51°57′06″N 177°39′15″E / 51.95167°N 177.65417°E / 51.95167; 177.65417 | Aleutians West Census Area, Alaska, US | |
| Little Sitkin Island | Sitignax̂ | Rat Islands | | 24.3 | | 51°56′55″N 178°30′15″E / 51.94861°N 178.50417°E / 51.94861; 178.50417 | Aleutians West Census Area, Alaska, US | |
| Little Tanaga Island | Tanagax̂ | Andreanof Islands | | 26.7 | | 51°50′37″N 176°09′51″W / 51.84361°N 176.16417°W / 51.84361; -176.16417 | Aleutians West Census Area, Alaska, US | |
| Medny Island (Russian: остров Медный) | | Commander Islands | | 72.0 | 0 | 54°42′24″N 167°43′02″E / 54.70667°N 167.71722°E / 54.70667; 167.71722 | Aleutsky District, Kamchatka Krai, RU | |
| Nizki Island | Avayax̂ | Near Islands | Semichi Islands | 2.8 | 0 | 52°44′28″N 173°59′08″E / 52.74111°N 173.98556°E / 52.74111; 173.98556 | Aleutians West Census Area, Alaska, US | |
| North Island | Chihngax̂ | Andreanof Islands | | 0.2 | | 51°50′04″N 176°47′48″W / 51.83444°N 176.79667°W / 51.83444; -176.79667 | Aleutians West Census Area, Alaska, US | |
| Ogangen Island | | Fox Islands | | 1.1 | | 53°26′47″N 166°52′32″W / 53.44639°N 166.87556°W / 53.44639; -166.87556 | Aleutians West Census Area, Alaska, US | |
| Ogliuga Island | Aglaga | Andreanof Islands | Delarof Islands | 1.9 | 0 | 51°36′22″N 178°39′23″E / 51.60611°N 178.65639°E / 51.60611; 178.65639 | Aleutians West Census Area, Alaska, US | |
| Oglodak Island | Ungluudâ | Andreanof Islands | | 1.5 | 0 | 51°59′03″N 175°27′17″W / 51.98417°N 175.45472°W / 51.98417; -175.45472 | Aleutians West Census Area, Alaska, US | |
| Peter Island | | Fox Islands | | 0.2 | | 53°41′38″N 166°50′31″W / 53.69389°N 166.84194°W / 53.69389; -166.84194 | Aleutians West Census Area, Alaska, US | |
| Poa Island | Saduuĝinax̂ | Fox Islands | | 0.2 | | 54°07′38″N 165°29′59″W / 54.12722°N 165.49972°W / 54.12722; -165.49972 | Aleutians East Census Area, Alaska, US | |
| Ringgold Island | Tanam Aduu | Andreanof Islands | | 0.6 | | 51°48′08″N 176°49′15″W / 51.80222°N 176.82083°W / 51.80222; -176.82083 | Aleutians West Census Area, Alaska, US | |
| Rootok Island | Aayux̂tax̂ | Fox Islands | Krenitzin Islands | 5.2 | 0 | 54°02′41″N 165°31′55″W / 54.04472°N 165.53194°W / 54.04472; -165.53194 | Aleutians East Census Area, Alaska, US | |
| Sadatanak Island | Sadan-tanax̂ | Andreanof Islands | | 0.5 | | 52°01′58″N 174°25′12″W / 52.03278°N 174.42000°W / 52.03278; -174.42000 | Aleutians West Census Area, Alaska, US | |
| Sagchudak Island | Saĝuugax̂ | Andreanof Islands | | 0.8 | | 52°01′17″N 174°29′26″W / 52.02139°N 174.49056°W / 52.02139; -174.49056 | Aleutians West Census Area, Alaska, US | |
| Salt Island | Uladax | Andreanof Islands | | 0.5 | | 52°10′19″N 174°38′26″W / 52.17194°N 174.64056°W / 52.17194; -174.64056 | Aleutians West Census Area, Alaska, US | |
| Samalga Island | Samalĝa | Fox Islands | | 1.8 | 0 | 52°47′00″N 169°12′17″W / 52.78333°N 169.20472°W / 52.78333; -169.20472 | Aleutians West Census Area, Alaska, US | |
| Sanak Island | Sanaĝax | Fox Islands | Sanak Islands | 45.6 | 0 | 54°25′47″N 162°42′32″W / 54.42972°N 162.70889°W / 54.42972; -162.70889 | Aleutians East Census Area, Alaska, US | |
| Sea Otter Rocks (Russian: Камни Бобровые) | | Commander Islands | | 0.2 | 0 | 54°52′33″N 167°26′08″E / 54.87583°N 167.43556°E / 54.87583; 167.43556 | Aleutsky District, Kamchatka Krai, RU | |
| Sedanka Island | Sidaanax̂ | Fox Islands | | 39.9 | 0 | 53°47′00″N 166°11′29″W / 53.78333°N 166.19139°W / 53.78333; -166.19139 | Aleutians West Census Area, Alaska, US | |
| Seguam Island | Saĝuugamax | Andreanof Islands | | 80.0 | 1 | 52°19′24″N 172°27′58″W / 52.32333°N 172.46611°W / 52.32333; -172.46611 | Aleutians West Census Area, Alaska, US | |
| Segula Island | Chiĝulax̂ | Rat Islands | | 13.3 | | 52°01′21″N 178°07′58″E / 52.02250°N 178.13278°E / 52.02250; 178.13278 | Aleutians West Census Area, Alaska, US | |
| Semisopochnoi Island | Unyax | Rat Islands | | 86.4 | 0 | 51°57′05″N 179°36′03″E / 51.95139°N 179.60083°E / 51.95139; 179.60083 | Aleutians West Census Area, Alaska, US | Easternmost point in the United States by longitude |
| Shemya Island | Samiyax̂ | Near Islands | Semichi Islands | 5.9 | | 52°43′27″N 174°07′08″E / 52.72417°N 174.11889°E / 52.72417; 174.11889 | Aleutians West Census Area, Alaska, US | |
| Skagul Island | Sxaĝulax̂ | Andreanof Islands | Delarof Islands | 1.7 | 0 | 51°35′51″N 178°35′17″E / 51.59750°N 178.58806°E / 51.59750; 178.58806 | Aleutians West Census Area, Alaska, US | |
| Staten Island | Iluuĝix̂ Tanax̂ | Andreanof Islands | | 0.4 | | 51°47′54″N 176°47′02″W / 51.79833°N 176.78389°W / 51.79833; -176.78389 | Aleutians West Census Area, Alaska, US | |
| Tagadak Island | Tanadax | Andreanof Islands | | 0.9 | | 51°57′23″N 176°00′24″W / 51.95639°N 176.00667°W / 51.95639; -176.00667 | Aleutians West Census Area, Alaska, US | |
| Tagalak Island | Tagalax̂ | Andreanof Islands | | 5.7 | | 51°57′44″N 175°43′12″W / 51.96222°N 175.72000°W / 51.96222; -175.72000 | Aleutians West Census Area, Alaska, US | |
| Tanadak Island | Tanaadax̂ | Andreanof Islands | Delarof Islands | 0.3 | 0 | 52°21′15″N 179°00′58″W / 52.35417°N 179.01611°W / 52.35417; -179.01611 | Aleutians West Census Area, Alaska, US | One of three different islands in the Aleutians named Tanadak Island, the other two being less than 0.1 square miles |
| Tanaga Island | Tanax̂ax | Andreanof Islands | | 204.0 | 0 | 51°47′34″N 177°55′43″W / 51.79278°N 177.92861°W / 51.79278; -177.92861 | Aleutians West Census Area, Alaska, US | |
| Tanaklak Island | Tanaqlax̂ | Andreanof Islands | | 1.5 | | 51°57′18″N 176°06′47″W / 51.95500°N 176.11306°W / 51.95500; -176.11306 | Aleutians West Census Area, Alaska, US | |
| Tanax Angunax | | Andreanof Islands | | 0.2 | | 52°06′40″N 174°12′07″W / 52.11111°N 174.20194°W / 52.11111; -174.20194 | Aleutians West Census Area, Alaska, US | One of three different islands in the Aleutians named Tanax Angunax, the other two being less than 0.1 square miles |
| Tan'gan | | Fox Islands | Baby Islands | 0.1 | | 53°59′50″N 166°03′52″W / 53.99722°N 166.06444°W / 53.99722; -166.06444 | Aleutians West Census Area, Alaska, US | |
| Tidgituk Island | Aakutanas | Andreanof Islands | | 0.1 | | 51°38′00″N 178°00′34″W / 51.63333°N 178.00944°W / 51.63333; -178.00944 | Aleutians West Census Area, Alaska, US | |
| Tigalda Island | Qigalĝan | Fox Islands | Krenitzin Islands | 35.0 | 0 | 54°05′48″N 165°03′27″W / 54.09667°N 165.05750°W / 54.09667; -165.05750 | Aleutians East Census Area, Alaska, US | |
| Tufted Puffin Rock (Russian: Остров Топорков) | | Commander Islands | | 0.1 | 0 | 55°12′21″N 165°56′03″E / 55.20583°N 165.93417°E / 55.20583; 165.93417 | Aleutsky District, Kamchatka Krai, RU | |
| Ugamak Island | Ugangax̂ | Fox Islands | Krenitzin Islands | 4.2 | 0 | 54°12′44″N 164°49′15″W / 54.21222°N 164.82083°W / 54.21222; -164.82083 | Aleutians East Census Area, Alaska, US | |
| Ulak Island | | Andreanof Islands | | 0.2 | | 52°02′44″N 175°54′01″W / 52.04556°N 175.90028°W / 52.04556; -175.90028 | Aleutians West Census Area, Alaska, US | One of two different islands named Ulak Island |
| Ulak Island | Uulax | Andreanof Islands | Delarof Islands | 12.1 | 0 | 51°21′54″N 178°56′50″W / 51.36500°N 178.94722°W / 51.36500; -178.94722 | Aleutians West Census Area, Alaska, US | One of two different islands named Ulak Island |
| Uliaga Island | Ulaĝa | Islands of Four Mountains | | 3.4 | 0 | 53°03′58″N 169°46′00″W / 53.06611°N 169.76667°W / 53.06611; -169.76667 | Aleutians West Census Area, Alaska, US | |
| Umak Island | Uhmax̂ | Andreanof Islands | | 14.3 | | 51°53′17″N 176°02′29″W / 51.88806°N 176.04139°W / 51.88806; -176.04139 | Aleutians West Census Area, Alaska, US | |
| Umnak Island | Unmax | Fox Islands | | 686.0 | 18 | 53°13′26″N 168°25′55″W / 53.22389°N 168.43194°W / 53.22389; -168.43194 | Aleutians West Census Area, Alaska, US | |
| Unalaska Island | Nawan-Alaxsxa | Fox Islands | | 1,051.0 | 5,638 | 53°40′24″N 166°38′54″W / 53.67333°N 166.64833°W / 53.67333; -166.64833 | Aleutians West Census Area, Alaska, US | Home of the city of Unalaska, the most populous city in the Aleutians |
| Unalga Island | Unalĝa | Andreanof Islands | Delarof Islands | 0.9 | 0 | 51°34′49″N 179°02′45″E / 51.58028°N 179.04583°E / 51.58028; 179.04583 | Aleutians West Census Area, Alaska, US | |
| Unalga Island | Unalĝa | Fox Islands | | 11.0 | 0 | 53°58′35″N 166°08′39″W / 53.97639°N 166.14417°W / 53.97639; -166.14417 | Aleutians West Census Area, Alaska, US | |
| Unimak Island | Unimax | Fox Islands | | 1,571.4 | 35 | 54°46′06″N 164°11′12″W / 54.76833°N 164.18667°W / 54.76833; -164.18667 | Aleutians East Census Area, Alaska, US | Largest island in the Aleutian islands, 9th largest island in the United States and the 134th largest island in the world |
| Uuyax | | Andreanof Islands | | 0.2 | | 51°57′55″N 175°38′28″W / 51.96528°N 175.64111°W / 51.96528; -175.64111 | Aleutians West Census Area, Alaska, US | |
| Vsevidof Island | Uyagax̂ | Fox Islands | | 0.9 | | 52°58′48″N 168°28′14″W / 52.98000°N 168.47056°W / 52.98000; -168.47056 | Aleutians West Census Area, Alaska, US | |
| Yunaska Island | Yunax̂sxa | Islands of Four Mountains | | 66.8 | 0 | 52°37′53″N 170°41′49″W / 52.63139°N 170.69694°W / 52.63139; -170.69694 | Aleutians West Census Area, Alaska, US |