Tafilalt or Tafilet (Arabic: تافيلالت‎) is a region and the most important and largest oasis of the Moroccan Sahara. It is also considered one of the largest oases in the world, the oasis is entirely located along the Ziz River. The oasis comprises the fortified villages of Erfoud, Arab Sebbah du Ziz, Rissani, Seffalat, Aoufous, and Jorf, together with palm groves stretching 30 miles (50 km) along the Wadi Ziz. The oasis is celebrated for its large and luscious dates, most of which it exports. It has tanning and handicraft industries, and its main trading centre is Erfoud at the base of Mount Erfoud.
The name Tafilalt is a Berber name meaning "the Country of the Hilali", as its inhabitants are called, because they were descended from the Arabian tribe of Banu Hilal, who settled here.