Avak is an impact crater centered approximately southeast of Utqiagvik, Alaska, United States.
Avak is a subcircular structure about in diameter and deep. In the structure, metamorphic basement rocks and regionally flat lying sedimentary rocks are uplifted and intensely deformed. The Avak structure has no surface expression in the swampy, lake-dotted tundra of the Arctic coastal plain. The structure is covered by a thin veneer of permanently frozen Pliocene and Pleistocene rock. This means that the age of the impact took place anywhere between 3 million and 95 million years ago.