List of island counties of the United States

The following is a list of United States counties and county equivalents exclusively or predominantly comprising islands.

Island counties of the United States

County

Islands

Dukes County, Massachusetts

Martha's Vineyard and the Elizabeth Islands

Hawaii County, Hawaii

Hawaii

Oahu and the Northwestern Hawaiian Islands (except Midway Atoll)

Island County, Washington

Whidbey Island, Camano Island, Strawberry Island, Smith Island, Minor Island, Baby Island, Ben Ure Island, Deception Island, and Kalamut Island

Kalawao County, Hawaii

The Kalaupapa Peninsula of Molokai

Kauai County, Hawaii

Kauai, Niihau, Lehua, and Kaula

Kings County, New York
(Borough of Brooklyn)

Westernmost Long Island

Kodiak Island Borough, Alaska

Kodiak Island, Afognak Island, Shuyak Island, Marmot Island, Raspberry Island, Little Raspberry Island, Whale Island, Spruce Island, Woody Island, Uganik Island, Sitkalidak Island, Tugidak Island, Sitkinak Island, Chirikof Island, the Semidi Islands, and a strip of the Alaska Peninsula

Maui County, Hawaii

Maui, Lānai, Molokai (except the Kalaupapa Peninsula), Kahoolawe, and Molokini

Nantucket County, Massachusetts

Nantucket

Nassau County, New York

West central Long Island, Long Beach Barrier Island, and western Jones Beach Island

Newport County, Rhode Island

Aquidneck Island, Conanicut Island, Prudence Island, and smaller islands in Narragansett Bay

New York County, New York
(Borough of Manhattan)

Manhattan Island, Roosevelt Island, Governors Island, Randalls and Wards Islands, Liberty Island, and part of Ellis Island

Queens County, New York
(Borough of Queens)

Western Long Island, Rulers Bar Hassock, and smaller islands in Jamaica Bay

San Juan County, Washington

Orcas Island, San Juan Island, Lopez Island, Shaw Island, and smaller San Juan Islands

City and Borough of Sitka, Alaska

Baranof Island and the southern half of Chichagof Island

Richmond County, New York
(Borough of Staten Island)

Staten Island, Isle of Meadows, Pralls Island, Swinburne Island, Hoffman Island, and most of Shooters Island

Suffolk County, New York

Eastern Long Island, Gardiners Island, Robins Island, Fire Island, Westhampton Island, and eastern Jones Beach Island

See also

  • Outline of the United States
  • Index of United States-related articles
  • Book:United States
  • Lists of counties in the United States