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 2 )
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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
1,342
6
St. Lawrence Island 1,983
5,135
1,352
7
Admiralty Island 1,684
4,362
650
8
Nunivak Island 1,625
4,209
191
9
Unimak Island 1,590
4,119
35
10
Baranof Island 1,570
4,065[ 5]
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]
584
14
Unalaska Island 1,051
2,722
1,759
15
Nelson Island 843
2,183
1,197
16
Kuiu Island 758
1,962[ 6]
10
17
Maui 727[ 1]
1,883[ 1]
Hawaii 144,444
18
Afognak 698
1,809
Alaska 169
19
Umnak 692
1,793
39
20
Oahu 597[ 1]
1,545[ 1]
Hawaii 953,207
21
Kauai 552[ 1]
1,430[ 1]
67,091
22
Atka Island 410
1,061
Alaska 61
23
Attu Island 346
896
0
24
Etolin Island 336
870
15
25
Montague Island 305
790
0
26
Adak Island 280
725
326
27
Molokai 260[ 1]
673[ 1]
Hawaii 7,345
28
Dall Island 253
655[ 5]
Alaska 20
29
Wrangell Island 216
560
2,401
30
Mitkof Island 211
546[ 6]
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
0
36
Unga Island 177
461
0
37
Amlia 176
459
0
38
Hinchinbrook Island 170
445
5
39
Kosciusko Island 169
438
52
40
Whidbey Island 169
437
Washington 58,211
41
Kruzof Island 168
435
Alaska 0
42
Kanaga Island 142
369
0
43
Lanai 141[ 1]
364[ 1]
Hawaii 3,193
44
St. Matthew Island 137
354
Alaska 0
45
Annette Island 132
342
1,447
46
Akutan Island 129
334
713
47
Drummond Island 125[ 10]
324
Michigan 1,058
48
Hagemeister Island 120
312
Alaska 0
49
Nagai Island 120
310
0
50
Amchitka 119
309
0
51
Sitkalidak Island 119
309
0
52
Mount Desert Island 108[ 11]
280[ 11]
Maine 10,424[ 11]
53
Kiska 107
278
Alaska 0
54
Knight Island 101
260
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
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
5,297
68
Santa Catalina Island 75
194
California 3,696
2 )
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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
0
0
Sitkinak Island 65
169
0
0
Akun Island 65
168
0
0
Shuyak Island 65
168
0
0
Chuginadak Island 65
167
0
0
Sukkwan Island 65
167
9
0.05
Galveston Island 64
166
Texas 58,175
350
Matagorda Island 61
157
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
0
0
Orcas Island 57
148
Washington 4,453
30.1
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
915
6.3
Stuart Island 56
145
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
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
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
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
100
1.1
Catherine Island 34
87
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
12.7
Grand Isle 32
82
Vermont 3,651
44.5
Kent Island 32
82
Maryland 16,812
205
Pine Island 32
82
Florida 8,235
100
Saint Thomas 32
81
U.S. Virgin Islands 51,181
632
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
Little Sitkin Island
24.0
62.1
Alaska
0
0
Madeline Island 24
62
Wisconsin 246
3.9
Washington Island 24
61
600
9.8
Assateague Island 24.4
63
Maryland Virginia 0
0
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
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
0
0
Neebish Island 22
56
66
1.2
Mon Louis Island
21.3
55.3
Alabama
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
St. Vincent Island
19.5
50.5
Florida
0
0
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
0.15
Roanoke Island 17.95
46.5
North Carolina 6,724
144
Georgetown Island
17.4
45.0
Maine
1,058
23.5
Santa Rosa Island
17.2
44.6
Florida
Taʻū 17.11
44.31
American Samoa 790
17.8
Agrihan
17.01
44.05
Northern Mariana Islands
0
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
0
Wellesley Island 13
33
New York 368
11
Segula Island
12.96
33.58
Alaska
0
0
Islesboro Island
12.4
32.1
Maine
583
18.2
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
500
St. George Island
11.7
30.3
990
32.7
Culebra
11.64
30.1
Puerto Rico
1,314
42.5
North Haven
11.6
30.1
Maine
417
13.9
Bogue Banks
11.3
29.1
North Carolina
~6,600
~22
Kiawah Island
11.17
28.93
South Carolina
1,769
61.1
Swan's Island
10.9
28.4
Maine
355
12.5
Mockhorn Island
10.9
28.3
Virginia
0
0
Hawadax Island
10.72
27.8
Alaska
0
0
Isle au Haut
10.7
27.6
Maine
92
3.3
Marsh Island
10.2
26.4
~7,000
265
Grosse Ile 9.6
24.9
Michigan 10,894
438
Sebascodegan Island
9.6
24.8
Maine
<5,000
<200
Conanicut Island 9.4
25.1
Rhode Island 5,622
224
Lummi Island
9.25
24
Washington
822
351
Block Island 9
25
Rhode Island 1,051
42
Westport Island
8.81
22.82
Maine
719
31.5
Cypress Island 8.6
22.3
Washington 40
1.8
Guemes Island 8.6
22.3
605
27
Ocracoke Island 8.6
22.3
North Carolina 797
35.7
Grindstone Island 8.5
22.1
New York ~20-700
~0.9-32
Absecon Island
8.2
21.2
New Jersey
57,457
2,710
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
Buldir Island
7.45
19.3
Alaska
0
0
Naushon Island 7.4
19
Massachusetts 30
1.57
Mercer Island 7
17
Washington 22,036
1,296
McNeil Island 6.63
17.2
214
12.4
Grahams Island
6.63
17.18
North Dakota
Sugar Island 6.575
17.03
Maine 0
0
Blakely Island 6.5
16.9
Washington 56
3.3
Chincoteague Island
6.41
16.6
Virginia
2,875
449
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
Hall Island (Alaska )
6.2
16.06
Alaska
0
0
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
0
0
Blakeley Island
5.36
13.88
Alabama
Wallops Island
5.24
13.6
Virginia
Fox Island 5.2
13.5
Washington 3,921
290
Gardiners Island 5.184
13.43
New York 0
0
^ 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 .
^ a b c
"Kodiak Island" . Encyclopædia Britannica Encyclopædia Britannica, Inc. 2007. 9369330. Archived from the original on January 17, 2008. Retrieved October 28, 2007 .
^ a b "State Area Measurements and Internal Point Coordinates" . United States Census Bureau . Retrieved February 24, 2024 .^ "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 .^ 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 .
^ a b c d e
Peacock, Elizabeth (December 13, 2004). "Kuiu" . 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 .
^ a b c
"Long Island" . Encyclopædia Britannica Encyclopædia Britannica, Inc. 2007. 9370515. Archived from the original on November 5, 2007. Retrieved October 29, 2007 .
^
"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 .
^ 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
^ 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 .
^ a b c
"Mount Desert Island" . Encyclopædia Britannica Encyclopædia Britannica, Inc. 2007. 9054016. Retrieved October 29, 2007 .
^ a b
"Channel Islands" . Encyclopædia Britannica Encyclopædia Britannica, Inc. 2007. 9360314. Archived from the original on June 4, 2006. Retrieved October 29, 2007 .
^ a b "PUERTO RICO FACTS and HISTORY" . U.S. Census Bureau . Archived from the original on February 12, 2020. Retrieved May 23, 2008 .^ a b c
"Nantucket" . Encyclopædia Britannica Encyclopædia Britannica, Inc. 2007. 9054798. Retrieved October 29, 2007 .
