The Kodiak Archipelago is an archipelago, or group of islands, south of the mainland of the United States state of Alaska, about 405 km (252 miles) by air south of Anchorage in the Gulf of Alaska. The largest island in the archipelago is Kodiak Island, the second largest island in the United States. The second largest island in the archipelago is Afognak, north of Kodiak Island.

The archipelago is about 285 km (177 miles) long and 108 km (67 miles) across, from the Barren Islands on the north to Chirikof Island and the Semidi Islands group on the south. The Archipelago contains 13,000 sq. km (5,000 sq. miles) of land.

The Kodiak Island Burough contains all of the Kodiak Archipelago and some lands on the mainland. The Kodiak National Wildlife Refuge encompasses a large percentage of the land in the archipelago.

The Kodiak Archipelago contains about 40 small glaciers, numerous streams and hundreds of species of land and marine animals. Much of its land is forested.