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.^{[citation needed]}

Islands over 75 square miles (190 km²)

† Signifies the largest island in the state or territory

Rank	Name	Area (sq mi)	Area (km²)	Location	Population (2020)^[1]
1	Hawaiʻi †	4,028^[2]	10,433^[2]	Hawaii	200,629
2	Kodiak Island †	3,588^[3]	9,293^[3]	Alaska	12,932^[4]^[5]
3	Puerto Rico †	3,513^[6]	9,100^[6]	Puerto Rico	3,275,833^[7]^[8]
4	Prince of Wales Island	2,577	6,675^[9]^[10]	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^[9]		8,532
11	Long Island †	1,401^[11]	3,629^[11]	New York	7,568,304^[11]
12	Revillagigedo Island	1,145	2,965^[10]	Alaska	13,477
13	Kupreanof Island	1,086	2,813^[10]		584
14	Unalaska Island	1,051	2,722		1,759
15	Nelson Island	843	2,183		1,197
16	Kuiu Island	758	1,962^[10]		10
17	Maui	727^[2]	1,883^[2]	Hawaii	154,100
18	Afognak	698	1,809	Alaska	169
19	Umnak	692	1,793	Alaska	39
20	Oʻahu	597^[2]	1,545^[2]	Hawaii	1,016,508
21	Kauaʻi	552^[2]	1,430^[2]	Hawaii	73,214
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	Molokaʻi	260^[2]	673^[2]	Hawaii	7,369
28	Dall Island	253	655^[9]	Alaska	20
29	Wrangell Island	216	560		2,401
30	Mitkof Island	211	546^[10]		3,364
31	Padre Island †	209^[12]	542	Texas	2,816
32	Guam †	209	541	Guam	154,805
33	Isle Royale †	206^[13]	534^[13]	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	Alaska	0
43	Lānaʻi	141^[2]	364^[2]	Hawaii	3,367
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^[14]	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^[15]	280^[15]	Maine	10,424^[15]
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^[16]	254^[16]	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	Density (per km²)
Heceta Island	70	181	Alaska	14	0.08
Niʻihau	70^[2]	180^[2]	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	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	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^[9]	Alaska	0	0
Tutuila	52	135	American Samoa	55,876	413.9
Esther Island	52	133	Alaska	31	0.23
Vieques	51	132^[17]	Puerto Rico	9,106^[17]	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^[18]	124^[18]	Massachusetts	9,520^[18]	76.7
Davis Island	46	120	Louisiana Mississippi	0	0
Kagalaska Island	45	116	Alaska	0	0
Kahoʻolawe	45^[2]	116^[2]	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^[9]	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		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	Wisconsin	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	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		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	Florida	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	Maine	~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	Washington	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	Washington	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	Michigan	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

References

↑ "2020 Census - Census Tract Reference Map". U.S. Census Bureau. January 2020. Retrieved August 7, 2025.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 "Table 5.08 - Land Area of Islands: 2000" (PDF). The State of Hawaii Data Book 2004. State of Hawaii. 2004. Retrieved October 25, 2007.
1 2 "Kodiak Island". Encyclopædia Britannica (Britannica Concise ed.). Encyclopædia Britannica, Inc. 2007. 9369330. Archived from the original on January 17, 2008. Retrieved October 28, 2007.
↑ "P1 | TOTAL POPULATION". data.census.gov. Retrieved August 8, 2025.
↑ Not including 169 residents of the borough who lived outside of the island itself.
1 2 "State Area Measurements and Internal Point Coordinates". United States Census Bureau. Retrieved February 24, 2024.
↑ "P1 | TOTAL POPULATION". US Census Bureau. Retrieved August 15, 2025.
↑ "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.
1 2 3 4 5 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.
1 2 3 4 5 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.
1 2 3 "Long Island". Encyclopædia Britannica (Britannica Concise ed.). 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.
1 2 "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.
1 2 3 "Mount Desert Island". Encyclopædia Britannica. Encyclopædia Britannica, Inc. 2007. 9054016. Retrieved October 29, 2007.
1 2 "Channel Islands". Encyclopædia Britannica (Britannica Concise ed.). Encyclopædia Britannica, Inc. 2007. 9360314. Archived from the original on June 4, 2006. Retrieved October 29, 2007.
1 2 "PUERTO RICO FACTS and HISTORY". U.S. Census Bureau. Retrieved May 23, 2008.{{cite web}}: CS1 maint: deprecated archival service (link)
1 2 3 "Nantucket". Encyclopædia Britannica. Encyclopædia Britannica, Inc. 2007. 9054798. Retrieved October 29, 2007.

[1] "2020 Census - Census Tract Reference Map". U.S. Census Bureau. January 2020. Retrieved August 7, 2025.

[TSOHDB-2] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 "Table 5.08 - Land Area of Islands: 2000" (PDF). The State of Hawaii Data Book 2004. State of Hawaii. 2004. Retrieved October 25, 2007.

[EBCki-3] 1 2 "Kodiak Island". Encyclopædia Britannica (Britannica Concise ed.). Encyclopædia Britannica, Inc. 2007. 9369330. Archived from the original on January 17, 2008. Retrieved October 28, 2007.

[4] "P1 | TOTAL POPULATION". data.census.gov. Retrieved August 8, 2025.

[5] Not including 169 residents of the borough who lived outside of the island itself.

[Geography-6] 1 2 "State Area Measurements and Internal Point Coordinates". United States Census Bureau. Retrieved February 24, 2024.

[7] "P1 | TOTAL POPULATION". US Census Bureau. Retrieved August 15, 2025.

[Census2020-Tab2-8] "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.

[USGSmfsm-9] 1 2 3 4 5 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.

[ADOFAGk-10] 1 2 3 4 5 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.

[EBCli-11] 1 2 3 "Long Island". Encyclopædia Britannica (Britannica Concise ed.). Encyclopædia Britannica, Inc. 2007. 9370515. Archived from the original on November 5, 2007. Retrieved October 29, 2007.

[PadreIsland-12] "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.

[NPSirnp-13] 1 2 "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

[14] 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.

[EBmdi-15] 1 2 3 "Mount Desert Island". Encyclopædia Britannica. Encyclopædia Britannica, Inc. 2007. 9054016. Retrieved October 29, 2007.

[EBCci-16] 1 2 "Channel Islands". Encyclopædia Britannica (Britannica Concise ed.). Encyclopædia Britannica, Inc. 2007. 9360314. Archived from the original on June 4, 2006. Retrieved October 29, 2007.

[TOOTGOTCOPR-17] 1 2 "PUERTO RICO FACTS and HISTORY". U.S. Census Bureau. Retrieved May 23, 2008.{{cite web}}: CS1 maint: deprecated archival service (link)

[EBn-18] 1 2 3 "Nantucket". Encyclopædia Britannica. Encyclopædia Britannica, Inc. 2007. 9054798. Retrieved October 29, 2007.

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Islands over 75 square miles (190 km2)

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

See also

References

Islands over 75 square miles (190 km²)

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