Sabha or Sebha is an oasis city in southwestern Libya, approximately 640 kilometres (400 mi) south of Tripoli. It was historically the capital of the Fezzan region and the Fezzan-Ghadames Military Territory and is now capital of the Sabha District. Sabha Air Base, south of the city, is a Libyan Air Force installation that is home to multiple MiG-25 aircraft.

Fezzan is the southwestern region of modern Libya. It is largely desert, but broken by mountains, uplands, and dry river valleys (wadis) in the north, where oases enable ancient towns and villages to survive deep in the otherwise inhospitable Sahara Desert. The term originally applied to the land beyond the coastal strip of Africa proconsularis, including the Nafusa and extending west of modern Libya over Ouargla and Illizi. As these Berber areas came to be associated with the regions of Tripoli, Cirta or Algiers, the name was increasingly applied to the arid areas south of Tripolitania.