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List of islands of the United States by area

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.

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

Islands over 75 square miles (190 km2)

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Rank Island's Name Area (sq mi) Area (km2) Location Population (2010)
1 Hawaii 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 3,513[3] 9,100[3]   Puerto Rico 3,285,874[4]
4 Prince of Wales Island 2,577 6,675[5][6]   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[5]   Alaska 8,532
11 Long Island 1,401[7] 3,629[7]   New York 7,568,304[7]
12 Revillagigedo Island 1,145 2,965[6]   Alaska 13,477
13 Kupreanof Island 1,086 2,813[6]   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[6]   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[5]   Alaska 20
29 Wrangell Island 216 560   Alaska 2,401
30 Mitkof Island 211 546[6]   Alaska 3,364
31 Padre Island 209[8] 542   Texas 2,816
32 Guam 209 541   Guam 154,805
33 Isle Royale 206[9] 534[9]   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[10] 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[11] 280[11]   Maine 10,424[11]
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[12] 254[12]   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)

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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 Density (per km2)
Heceta Island 70 181   Alaska 14 0.08
Niihau 70[1] 180[1]   Hawaii 160 0.9
Saipan 69 180   Northern Mariana Islands 62,392 346
Tugidak Island 69 180   Alaska 0 0
Edisto Island 68 176   South Carolina 2,301 13
Hawkins Island 67 175   Alaska 4 0.023
Yunaska Island 67 172   Alaska 0 0
Sitkinak Island 65 169   Alaska 0 0
Akun Island 65 168   Alaska 0 0
Shuyak Island 65 168   Alaska 0 0
Chuginadak Island 65 167   Alaska 0 0
Sukkwan Island 65 167   Alaska 9 0.05
Galveston Island 64 166   Texas 58,175 350
Matagorda Island 61 157   Texas 0 0
Great Sitkin Island 60 156   Alaska 0 0
Staten Island 59 153   New York 443,728 2,900
Deer Island 58 152   Alaska 0 0
Duke Island 57 149   Alaska 0 0
Orcas Island 57 148   Washington 4,453 0.03
Cumberland Island 57 147   Georgia 0 0
San Clemente Island 57 147   California 0 0
Uganik Island 57 147   Alaska 0 0
St. Michael Island 56 145   Alaska 915 6.3
Stuart Island 56 145   Alaska 0 0
Hilton Head Island 55 144   South Carolina 33,862 235
Beaver Island 55 144   Michigan 551 3.8
San Juan Island 55 143   Washington 6,822 47.7
Suemez Island 52 135[5]   Alaska 0 0
Tutuila 52 135   American Samoa 55,876 413.9
Esther Island 52 133   Alaska 31 0.23
Vieques 51 132[13]   Puerto Rico 9,106[13] 69
Sanak Island 50 128   Alaska 0 0
Sugar Island 49 128   Michigan 652 5
Bois Blanc Island 49 127   Michigan 71 0.56
Nantucket 48[14] 124[14]   Massachusetts 9,520[14] 76.7
Davis Island 46 120   Louisiana   Mississippi 0 0
Kagalaska Island 45 116   Alaska 0 0
Kahoolawe 45[1] 116[1]   Hawaii 0 0
Long Island 45 115   Alaska 0 0
Chirikof Island 44 115   Alaska 0 0
Wadmalaw Island 42 109   South Carolina 2,611 23.9
Antelope Island 42 109   Utah 0 0
Dolgoi Island 41 107   Alaska 0 0
Fidalgo Island 41 107   Washington 20,700 193
Baker Island 41 105[5]   Alaska 0 0
Camano Island 40 105   Washington 13,358 127
Saint Paul Island 40 104   Alaska 532 5
Sedanka Island 40 103   Alaska 0 0
Deer Isle <40 <102   Maine <3,028 29
Tinian 39 102   Northern Mariana Islands 3,540 34.7
Aquidneck Island/Rhode Island 38 98   Rhode Island 60,870 621
Vashon Island 37 96   Washington 10,123 105
Tigalda Island 35 91   Alaska 0 0
Saint George Island 35 90   Alaska 100 1.1
Catherine Island 34 87   Alaska 0 0
Hatteras Island 34 86   North Carolina 4,001 46.5
Rota 33 85   Northern Mariana Islands 2,477 29
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 0
Lopez Island 30 77   Washington 2,177 28
Grand Island 29 73   New York 18,621 255
Bainbridge Island 28 72   Washington 20,308 282
Gareloi Island 26 67   Alaska 0 0
Assateague Island 24.4 63   Maryland   Virginia 0 0
Madeline Island 24 62   Wisconsin 246 3.9
Washington Island 24 61   Wisconsin 600 9.8
Vinalhaven Island 23 61   Maine 1,235 20
Manhattan 23 60   New York 1,537,195 25,619
San Nicolas Island 23 59   California 0 0
Alameda Island 23 59   California 73,812 1,251
Marquette Island 23 59   Michigan 0 0
Woronkofski Island 23 59   Alaska 0 0
Grand Island 22 58   Michigan 45 0.8
North Manitou Island 22 58   Michigan 0 0
Neebish Island 22 56   Michigan 66 1.2
Oak Island 21 53   North Carolina 8,386 158
Tuxekan Island 20 53   Alaska 0 0
Saint John 20 51   U.S. Virgin Islands 4,007 78
Harstine Island 18.65 48.3   Washington 1,412 29.4
Amelia Island 18.2 47.1   Florida 10,716 228
Pagan 18 47   Northern Mariana Islands 7
Roanoke Island 17.95 46.5   North Carolina 6,724 144
Georgetown Island 17.4 45.0   Maine 1,058
Taʻū 17.11 44.31   American Samoa 790 17.8
Agrihan 17.01 44.05   Northern Mariana Islands 0
Sanibel Island 16.18 41.90   Florida 6,382 152
Stockton Island 15.5 40   Wisconsin 0 0
Key Largo 15.25 39.49   Florida 12,447 315
Fenwick Island 15 38   Delaware   Maryland 8,002 210.5
San Miguel Island 15 38   California 0 0
Anatahan 13.09 33.91   Northern Mariana Islands 0
Wellesley Island 13 33   New York 368 11
Islesboro Island 12.4 32.1   Maine 583
Outer Island 12.3 31.8   Wisconsin 0 0
Shelter Island 12.19 31.58   New York 2,413 76.4
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 1.8
Guemes Island 8.6 22.3   Washington 605 27
Ocracoke Island 8.6 22.3   North Carolina 797 35.7
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 47.5
South Manitou Island 8 21   Michigan 0 0
Oak Island 7.9 20.3   Wisconsin 0 0
Garden Island 7.8 20.2   Michigan 0 0
Anderson Island 7.75 20.1   Washington 1,037 51.6
Arrowsic Island 7.75 20.07   Maine 477 23.8
Shaw Island 7.7 20   Washington 240 12
Bulls Island 7.66 19.8   South Carolina 0 0
Puget Island 7.5 19.4   Washington 831 42.8
Naushon Island 7.4 19   Massachusetts 30 1.57
Mercer Island 7 17   Washington 22,036 1,296
McNeil Island 6.63 17.2   Washington 214 12.4
Sugar Island 6.575 17.03   Maine 0 0
Blakely Island 6.5 16.9   Washington 56 3.3
Marrowstone Island 6.3 16.4   Washington 844 51.5
Dauphin Island 6.26 16.2   Alabama 1,371 84.6
Verona Island 6.24 16.16   Maine 507 31.4
Shemya 5.9 15.3   Alaska 0 0
Prudence Island 5.57 14.43   Rhode Island 278 19.3
South Core Banks 5.5 14.2   North Carolina 0 0
High Island (Michigan) 5.5 14.1   Michigan 0 0
South Fox Island 5.4 13.9   Michigan 0 0
Fox Island 5.2 13.5   Washington 3,921 290
Gardiners Island 5.184 13.43   New York 0 0

See also

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References

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  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. ^ a b "State Area Measurements and Internal Point Coordinates". United States Census Bureau. Retrieved February 24, 2024.
  4. ^ "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.
  5. ^ 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.
  6. ^ 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.
  7. ^ 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.
  8. ^ "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.
  9. ^ 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
  10. ^ 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.
  11. ^ a b c "Mount Desert Island". Encyclopædia Britannica. Encyclopædia Britannica, Inc. 2007. 9054016. Retrieved October 29, 2007.
  12. ^ 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.
  13. ^ a b "PUERTO RICO FACTS and HISTORY". U.S. Census Bureau. Archived from the original on February 12, 2020. Retrieved May 23, 2008.
  14. ^ a b c "Nantucket". Encyclopædia Britannica. Encyclopædia Britannica, Inc. 2007. 9054798. Retrieved October 29, 2007.
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