The Alutiiq Museum and Archaeological Repository has more than 250,000 objects with links to the history and culture of the Alutiiq tribe. These objects include archaeological materials, archival items, ethnographic objects, photographs, film and audio recordings, and specimens from natural history.

The Alutiiq Museum has greater than 100,000 prehistoric and historic artifacts in its possession. These items were gathered from excavations and archaeological surveys. Remains of plants and animals, as well as sediment samples, are sometimes collected with the artifacts. For its photographic collection, the museum has more than 42,000 photographic images under its care. Visitors can view prints, negatives, slides, and digital images portraying everything about the Alutiiq people, as well as archaeological excavations and cultural programs are events. The library houses 11,000 photos as well.

The Alutiiq Museum has an extensive ethnographic collection that includes objects made as far back as the historic period. Objects gathered from their living owners, replicas, and contemporary artworks are also present. Visitors can see and hear for themselves film and audio footages of the Alutiiq language, archaeological excavations, interviews, and more of events and activities related to the Alutiiq people. Some of the recordings have an accompanying transcript.

The Alutiiq Museum has both original and copies of paper archives that document events and activities in connection with the Aluttiq tribe. These include original documents of the tribe leaders, notes and maps from archaeological excavations, and historical documents.