The Imamate of Aussa (also spelled Awsa) is a medieval imamate in present-day eastern Ethiopia.

It is carved out of the Sultanate of Harar and the Adal Sultanate.

In 1647, the rulers of the Emirate of Harar break away to form their own polity.

The Imamate of Awsa is later destroyed by the local Mudaito Afar in 1672.

Following the Awsa Imamate's demise, the Mudaito Afars found their own kingdom, the Sultanate of Aussa.