Ubari or Awbari is a Tuareg Berber–speaking oasis town and the capital of the Wadi al Hayaa District, in the Fezzan region of southwestern Libya. It is in the Idehan Ubari, a Libyan section of the Sahara Desert. It was the capital of the former baladiyah (district) called Awbari, in the southwest of the country.

In ecology, an oasis is a fertile area of a desert or semi-desert environment that sustains plant life and provides habitat for animals. Surface water and land may be present, or water may only be accessible from wells or underground channels created by humans. In geography, an oasis may be a current or past rest stop on a transportation route, or less-than-verdant location that nonetheless provides access to underground water through deep wells created and maintained by humans.