Habayia is an extinct genus of traversodontid cynodonts from the Late Triassic of Belgium.

A single postcanine tooth was found in Habay-la-Vieille in southern Belgium.

Based on the size of the tooth, Habayia was very small.

Habayia lived during the Rhaetian stage of the Late Triassic at a time when western Europe was an island archipelago due to high sea levels.

The small size of Habayia may be a result of insular dwarfism.