Warren Island is an island in the Alexander Archipelago

Alexander Archipelago

The Alexander Archipelago is a long archipelago, or group of islands, of North America off the southeastern coast of Alaska. It contains about 1,100 islands, which are the tops of the submerged coastal mountains that rise steeply from the Pacific Ocean. Deep channels and fjords separate the...

 of southeastern Alaska

Alaska

Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...

, USA. It lies on the Pacific

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

 coast just southwest of the community of Edna Bay

Edna Bay, Alaska

Edna Bay is a census-designated place on Kosciusko Island in Prince of Wales-Hyder Census Area, Alaska, United States. The population was 49 at the 2000 census....

 (on Kosciusko Island

Kosciusko Island

Kosciusko Island is an island in the Alexander Archipelago of southeastern Alaska, USA. It lies near the northwest corner of Prince of Wales Island, just across the El Capitan Passage from the larger island. Kosciusko Island has a land area of 171.585 sq mi , making it the 38th largest island in...

). Directly west is Coronation Island

Coronation Island (Alaska)

Coronation Island is located off the northwest coast of Prince of Wales Island, south of Kuiu Island, and north of Noyes Island. The nearest full service community is Craig, Alaska. The island is also home to the Coronation Island Wilderness, which encompasses ....

 and directly north is Kuiu Island

Kuiu Island

Kuiu Island is an island in the Alexander Archipelago in southeastern Alaska. It lies between Kupreanof Island, to its east, and Baranof Island, to its west. The island is long, and 10–23 km wide. It is nearly cut in two by Affleck Canal. It has of land area, making it the 15th largest...

. Warren Island has a land area of 47.191 km² (18.22 sq mi) and no permanent resident population. The entire island has been designated as the Warren Island Wilderness, a part of Tongass National Forest

Tongass National Forest

The Tongass National Forest in southeastern Alaska is the largest national forest in the United States at 17 million acres . Most of its area is part of the temperate rain forest WWF ecoregion, itself part of the larger Pacific temperate rain forest WWF ecoregion, and is remote enough to be home...

.