Eyak is a Na-Dene language spoken in Alaska.

The language has one surviving elderly speaker, Marie Smith. Because of the dying off of its native speakers, Eyak has become a poster child for the fight against language extinction.

The closest relatives of Eyak are the Athabaskan languages. The Eyak-Athabaskan cluster, together with Tlingit, forms a basic division of the Na-Dene language phylum.