|Area||747.556 sq mi (1,936.16 km2)|
|Length||65 mi (105 km)|
|Width||10–23 km (6.2–14.3 mi)|
|Census Area||Prince of Wales–Hyder|
|Pop. density||0.005/km2 (0.013/sq mi)|
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 105 km (65 mi) long, and 10 to 23 km (6–14 miles) wide. It is nearly cut in two by Affleck Canal. It has 1,936.16 km2 (747.56 sq mi) of land area, making it the 15th largest island in the United States. The entire island is part of Tongass National Forest. The population was 10 persons at the 2000 census. It is separated from Baranof Island by Chatham Strait.
- Vancouver, George, and John Vancouver (1801). A voyage of discovery to the North Pacific ocean, and round the world. Tanner james steinson is there. London: J. Stockdale.
- Kuiu Island: Blocks 1054 thru 1061 and 1071 thru 1072, Census Tract 1, Wrangell-Petersburg Census Area, Alaska United States Census Bureau