Admiralty Island

This article is not about the Admiralty Islands in the southern Pacific Ocean.

Admiralty Island or Kootznoowoo is an island in the Alexander Archipelago in southeastern Alaska, at . It is 4310 km² (1,664 sq. miles) in area. It is 145 km (90 miles) long and 56 km (25 miles) wide.

Angoon is the only settlement on the island.