Satellite image of the Big Island of Hawaii, the largest island in the United States.
Scale depiction of the 5 largest islands in the US, with some other significant islands

This is a list of islands of the United States, as ordered by area. It includes most islands with an area greater than 20 square miles (approximately 52 km2). Mainland areas cut by human-made canals are not considered islands.

Islands over 75 square miles (190 km2)

Rank Island's Name Area (sq mi) Area (km2) Location Population (2010)
1 Hawaii Island (the Big Island) 4,028[1] 10,433[1]  Hawaii 185,079
2 Kodiak Island 3,588[2] 9,293[2]  Alaska 13,592[2]
3 Puerto Rico 3,363 8,710  Puerto Rico 3,285,874[3]
4 Prince of Wales Island 2,577 6,675[4][5]  Alaska 5,559
5 Chichagof Island 2,080 5,388  Alaska 1,342
6 St. Lawrence Island 1,983 5,135  Alaska 1,352
7 Admiralty Island 1,684 4,362  Alaska 650
8 Nunivak Island 1,625 4,209  Alaska 191
9 Unimak Island 1,590 4,119  Alaska 35
10 Baranof Island 1,570 4,065[4]  Alaska 8,532
11 Long Island 1,401[6] 3,629[6]  New York 7,568,304[6]
12 Revillagigedo Island 1,145 2,965[5]  Alaska 13,477
13 Kupreanof Island 1,086 2,813[5]  Alaska 584
14 Unalaska Island 1,051 2,722  Alaska 1,759
15 Nelson Island 843 2,183  Alaska 1,197
16 Kuiu Island 758 1,962[5]  Alaska 10
17 Maui 727[1] 1,883[1]  Hawaii 144,444
18 Afognak 698 1,809  Alaska 169
19 Umnak 692 1,793  Alaska 39
20 Oahu 597[1] 1,545[1]  Hawaii 953,207
21 Kauai 552[1] 1,430[1]  Hawaii 67,091
22 Atka Island 410 1,061  Alaska 61
23 Attu Island 346 896  Alaska 0
24 Etolin Island 336 870  Alaska 15
25 Montague Island 305 790  Alaska 0
26 Adak Island 280 725  Alaska 326
27 Molokai 260[1] 673[1]  Hawaii 7,345
28 Dall Island 253 655[4]  Alaska 20
29 Wrangell Island 216 560  Alaska 2,401
30 Mitkof Island 211 546[5]  Alaska 3,364
31 Padre Island 209[7] 542  Texas 2,816
32 Guam 209 541  Guam 154,805
33 Isle Royale 206[8] 534[8]  Michigan 0
34 Tanaga Island 204 529  Alaska 0
35 Zarembo Island 185 478  Alaska 0
36 Unga Island 177 461  Alaska 0
37 Amlia 176 459  Alaska 0
38 Hinchinbrook Island 170 445  Alaska 5
39 Kosciusko Island 169 438  Alaska 52
40 Whidbey Island 169 437  Washington 58,211
41 Kruzof Island 168 435  Alaska 0
42 Kanaga Island 142 369  Alaska 0
43 Lanai 141[1] 364[1]  Hawaii 3,193
44 St. Matthew Island 137 354  Alaska 0
45 Annette Island 132 342  Alaska 1,447
46 Akutan Island 129 334  Alaska 713
47 Drummond Island 125[9] 324  Michigan 1,058
48 Hagemeister Island 120 312  Alaska 0
49 Nagai Island 120 310  Alaska 0
50 Amchitka 119 309  Alaska 0
51 Sitkalidak Island 119 309  Alaska 0
52 Mount Desert Island 108[10] 280[10]  Maine 10,424[10]
53 Kiska 107 278  Alaska 0
54 Knight Island 101 260  Alaska 0
55 Marsh Island 100 259  Louisiana 0
56 Santa Cruz Island 98[11] 254[11]  California 2
57 Gravina Island 95 245  Alaska 50
58 Martha's Vineyard 91 236  Massachusetts 14,901
59 Agattu 90 234  Alaska 0
60 Semisopochnoi Island 86 224  Alaska 0
61 Johns Island 84 217  South Carolina 11,477
62 Seguam Island 83 215  Alaska 1
63 Saint Croix 84 212  U.S. Virgin Islands 53,234
64 Yakobi Island 82 212  Alaska 0
65 Santa Rosa Island 81 209  California 2
66 Raspberry Island 77 200  Alaska 2
67 Douglas Island 77 199  Alaska 5,297
68 Santa Catalina Island 75 194  California 3,696

Islands 5–75 square miles (13–194 km2)

This section of the list is not complete, although it should cover most of the islands in the United States over 20 square miles (52 km2).

Island's Name Area (sq mi) Area (km2) Location Population
Heceta Island 70 181  Alaska 14
Niihau 70[1] 180[1]  Hawaii 160
Saipan 69 180  Northern Mariana Islands 62,392
Tugidak Island 69 180  Alaska 0
Edisto Island 68 176  South Carolina 2,301
Hawkins Island 67 175  Alaska 4
Yunaska Island 67 172  Alaska 0
Sitkinak Island 65 169  Alaska 0
Akun Island 65 168  Alaska 0
Shuyak Island 65 168  Alaska 0
Chuginadak Island 65 167  Alaska 0
Sukkwan Island 65 167  Alaska 9
Galveston Island 64 166  Texas 58,175
Matagorda Island 61 157  Texas 0
Great Sitkin Island 60 156  Alaska 0
Staten Island 59 153  New York 443,728
Deer Island 58 152  Alaska 0
Duke Island 57 149  Alaska 0
Orcas Island 57 148  Washington 4,453
Cumberland Island 57 147  Georgia 0
San Clemente Island 57 147  California 0
Uganik Island 57 147  Alaska 0
St. Michael Island 56 145  Alaska 915
Stuart Island 56 145  Alaska 0
Hilton Head Island 55 144  South Carolina 33,862
Beaver Island 55 144  Michigan 551
San Juan Island 55 143  Washington 6,822
Suemez Island 52 135[4]  Alaska 0
Tutuila 52 135  American Samoa 55,876
Esther Island 52 133  Alaska 31
Vieques 51 132[12]  Puerto Rico 9,106[12]
Sanak Island 50 128  Alaska 0
Sugar Island 49 128  Michigan 652
Bois Blanc Island 49 127  Michigan 71
Nantucket 48[13] 124[13]  Massachusetts 9,520[13]
Davis Island 46 120  Louisiana  Mississippi 0
Kagalaska Island 45 116  Alaska 0
Kahoolawe 45[1] 116[1]  Hawaii 0
Long Island 45 115  Alaska 0
Chirikof Island 44 115  Alaska 0
Wadmalaw Island 42 109  South Carolina 2,611
Antelope Island 42 109  Utah 0
Dolgoi Island 41 107  Alaska 0
Fidalgo Island 41 107  Washington 20,700
Baker Island 41 105[4]  Alaska 0
Camano Island 40 105  Washington 13,358
Saint Paul Island 40 104  Alaska 532
Sedanka Island 40 103  Alaska 0
Deer Isle <40 <102  Maine <3,028
Tinian 39 102  Northern Mariana Islands 3,540
Aquidneck Island/Rhode Island 38 98  Rhode Island 60,870
Vashon Island 37 96  Washington 10,123
Tigalda Island 35 91  Alaska 0
Saint George Island 35 90  Alaska 100
Catherine Island 34 87  Alaska 0
Hatteras Island 34 86  North Carolina 4,001
Rota 33 85  Northern Mariana Islands 2,477
Sauvie Island 33 85  Oregon 1,078
Grand Isle 32 82  Vermont 3,651
Kent Island 32 82  Maryland 16,812
Pine Island 32 82  Florida 8,235
Saint Thomas 32 81  U.S. Virgin Islands 51,181
Coronation Island 30 78  Alaska 0
Lopez Island 30 77  Washington 2,177
Grand Island 29 73  New York 18,621
Bainbridge Island 28 72  Washington 20,308
Gareloi Island 26 67  Alaska 0
Assateague Island 24.4 63  Maryland  Virginia 0
Madeline Island 24 62  Wisconsin 246
Washington Island 24 61  Wisconsin 600
Vinalhaven Island 23 61  Maine 1,235
Manhattan 23 60  New York 1,537,195
San Nicolas Island 23 59  California 0
Alameda Island 23 59  California 73,812
Marquette Island 23 59  Michigan 0
Woronkofski Island 23 59  Alaska 0
Grand Island 22 58  Michigan 45
North Manitou Island 22 58  Michigan 0
Neebish Island 22 56  Michigan 66
Oak Island 21 53  North Carolina 8,386
Tuxekan Island 20 53  Alaska 0
Saint John 20 51  U.S. Virgin Islands 4,007
Harstine Island 18.65 48.3  Washington 1,412
Amelia Island 18.2 47.1  Florida 10,716
Pagan 18 47  Northern Mariana Islands 7
Roanoke Island 17.95 46.5  North Carolina 6,724
Georgetown Island 17.4 45.0  Maine 1,058
Taʻū 17.11 44.31  American Samoa 790
Agrihan 17.01 44.05  Northern Mariana Islands 0
Sanibel Island 16.18 41.90  Florida 6,382
Stockton Island 15.5 40  Wisconsin 0
Key Largo 15.25 39.49  Florida 12,447
Fenwick Island 15 38  Delaware  Maryland 8,002
San Miguel Island 15 38  California 0
Anatahan 13.09 33.91  Northern Mariana Islands 0
Wellesley Island 13 33  New York 368
Islesboro Island 12.4 32.1  Maine 583
Outer Island 12.3 31.8  Wisconsin 0
Shelter Island 12.19 31.58  New York 2,413
Marco Island 12.1 31.5  Florida 15,760
Culebra 11.64 30.9  Puerto Rico 1,314
North Haven 11.6 30.1  Maine 417
Bogue Banks 11.3 29.1  North Carolina ~6,600
Kiawah Island 11.17 28.93  South Carolina 1,769
Swan's Island 10.9 28.4  Maine 355
Mockhorn Island 10.9 28.3  Virginia 0
Isle au Haut 10.7 27.6  Maine 92
Marsh Island 10.2 26.4  Maine ~7,000
Grosse Ile 9.6 24.9  Michigan 10,894
Sebascodegan Island 9.6 24.8  Maine <5,000
Conanicut Island 9.4 25.1  Rhode Island 5,622
Lummi Island 9.25 24 Washington 822
Block Island 9 25  Rhode Island 1,051
Westport Island 8.81 22.82  Maine 719
Cypress Island 8.6 22.3  Washington 40
Guemes Island 8.6 22.3  Washington 605
Ocracoke Island 8.6 22.3  North Carolina 797
Grindstone Island 8.5 22.1  New York ~20-700
Absecon Island 8.2 21.2  New Jersey 57,457
Grand Isle 8.17 21.17  Louisiana 1,005
South Manitou Island 8 21  Michigan 0
Oak Island 7.9 20.3  Wisconsin 0
Garden Island 7.8 20.2  Michigan 0
Anderson Island 7.75 20.1  Washington 1,037
Arrowsic Island 7.75 20.07  Maine 477
Shaw Island 7.7 20.0  Washington 240
Bulls Island 7.66 19.8  South Carolina 0
Puget Island 7.5 19.4  Washington 831
Naushon Island 7.4 19  Massachusetts 30
Mercer Island 7 17  Washington 22,036
McNeil Island 6.63 17.2  Washington 214
Sugar Island 6.575 17.03  Maine 0
Blakely Island 6.5 16.9  Washington 56
Marrowstone Island 6.3 16.4  Washington 844
Dauphin Island 6.26 16.2  Alabama 1,371
Verona Island 6.24 16.16  Maine 507
Shemya 5.9 15.3  Alaska 0
Prudence Island 5.57 14.43  Rhode Island 278
South Core Banks 5.5 14.2  North Carolina 0
High Island (Michigan) 5.5 14.1  Michigan 0
South Fox Island 5.4 13.9  Michigan 0
Fox Island 5.2 13.5  Washington 3,633
Gardiners Island 5.184 13.43  New York 0

See also

References

  1. ^ a b c d e f g h i j k l m n o p "Table 5.08 - Land Area of Islands: 2000" (PDF). The State of Hawaii Data Book 2004. State of Hawaii. 2004. Retrieved October 25, 2007.
  2. ^ a b c "Kodiak Island". Encyclopædia Britannica (Britannica Concise ed.). Encyclopædia Britannica, Inc. 2007. 9369330. Archived from the original on January 17, 2008. Retrieved October 28, 2007.
  3. ^ "Table 2. Resident Population for the 50 States, the District of Columbia, and Puerto Rico: 2020 Census" (PDF). United States Census Bureau. April 26, 2021. Retrieved April 26, 2021.
  4. ^ a b c d e Carrara, Paul E.; Ager, Thomas A.; Baichtal, James F.; VanSistine, D. Paco (2003). "Miscellaneous Field Studies Map MF–2424" (PDF). Map of Glacial Limits and Possible Refugia in the Southern Alexander Archipelago, Alaska, During the Late Wisconsin Glaciation. Denver, Colorado: United States Geological Survey. Retrieved October 24, 2007.
  5. ^ a b c d e Peacock, Elizabeth (December 13, 2004). "Kuiu" (PDF). Glaciers, Mountains, and Salt Water: Assessing Barriers to Movement of a Vagile Species. Reno, Nevada: Alaska Department of Fish and Game. Retrieved October 29, 2007.
  6. ^ a b c "Long Island". Encyclopædia Britannica (Britannica Concise ed.). Encyclopædia Britannica, Inc. 2007. 9370515. Archived from the original on November 5, 2007. Retrieved October 29, 2007.
  7. ^ "Padre Island". Handbook of Texas Online. University of Texas. Retrieved November 12, 2007. Padre Island comprises a total of 133,918 acres (541.95 km2) in Nueces, Kleberg, Willacy, Cameron, and Kenedy County, Texas.
  8. ^ a b "Isle Royale National Park - Nature & Science". Isle Royale National Park. National Park Service. July 25, 2006. Retrieved October 29, 2007. Isle Royale National Park preserves 132,018 acres (534.26 km2) of land-based wilderness
  9. ^ Drummond Island comprises the bulk of Drummond Township, Chippewa County, Michigan. According to the U.S. Census Bureau, the land area of Drummond Township is 334.3 km2, or 249.1 mi2, and its population was 1,049 in 2017. The township includes a number of apparently uninhabited smaller islands in Potagannissing Bay, and their estimated combined area is not more than four mi2.
  10. ^ a b c "Mount Desert Island". Encyclopædia Britannica. Encyclopædia Britannica, Inc. 2007. 9054016. Retrieved October 29, 2007.
  11. ^ a b "Channel Islands". Encyclopædia Britannica (Britannica Concise ed.). Encyclopædia Britannica, Inc. 2007. 9360314. Archived from the original on June 4, 2006. Retrieved October 29, 2007.
  12. ^ a b "PUERTO RICO FACTS and HISTORY". U.S. Census Bureau. Archived from the original on February 12, 2020. Retrieved May 23, 2008.
  13. ^ a b c "Nantucket". Encyclopædia Britannica. Encyclopædia Britannica, Inc. 2007. 9054798. Retrieved October 29, 2007.
Categories