Where are the ABC islands in the United States?

The ABC Islands is the colloquial name for the Alaskan islands of Admiralty, Baranof, and Chichagof in the northern part of the Alexander Archipelago. They are among the largest islands in the United States: Chichagof is the 5th largest US island, Admiralty is the 7th largest and Baranof is the 10th largest. The islands all form part of the Tongass National Forest.

The Tongass National Forest is in Southeast Alaska (the panhandle) and is the largest national forest in the United States at 16.7 million acres (68,000 km2). Most of its area is part of the temperate rain forest WWF (World Wide Fund for Nature) ecoregion, itself part of the larger Pacific temperate rain forest WWF ecoregion, and is remote enough to be home to many species of endangered and rare flora and fauna. The forest is administered from Forest Service offices in Ketchikan. There are local ranger district offices located in Craig, Hoonah, Juneau, Ketchikan, Petersburg, Sitka, Thorne Bay, Wrangell, and Yakutat.

The islands are known for their wilderness and wildlife, including a dense brown bear population. Most of the islands' area is federally protected wilderness. The city of Sitka has its urban centre on the west coast of Baranof Island. Outside of Sitka, there is only minimal industry and human presence on the islands, despite their size.