Kosciusko Island Island

Address: Kosciusko Island, Prince of Wales‑Hyder Census Area, Alaska, United States

Kosciusko Island is a forested island in Alaska’s Alexander Archipelago, in the southeastern part of the state. It lies within the temperate rainforest zone and is remote and sparsely developed.

The island’s coastline is indented with bays and inlets and the interior is dominated by coastal forest and wetland terrain typical of the region. Human presence is limited and land use historically includes small-scale settlement, subsistence uses and, in parts of the archipelago, timber activities.

Administration falls under U.S. federal and Alaskan authorities; the island is within the maritime landscape of the Alexander Archipelago and is accessed by boat or aircraft from larger nearby communities.

• Conservation status: Part of the Alexander Archipelago and administered within the Tongass National Forest, so land-use and access are subject to federal and state rules.
• Access: Most access is by private boat or floatplane; there are no major road connections to the island.

Access is by private boat or floatplane from regional hubs in Southeast Alaska. Charter services operate seasonally; coordinate with local operators and check weather forecasts carefully.

• Bring a shortwave radio or satellite communication device-cell coverage is limited on many Alaskan islands.
• If exploring, register intentions with local authorities; wildlife and weather create real hazards.
• Respect local indigenous land use and check for seasonal closures (e.g., bird nesting or subsistence activities).