Tamanrasset or Tamanghasset (Arabic: ولاية تمنراست Wilāya Tamanrāssat, Berber languages: ⵜⵣ'ⵓⵏⵜ ⵏ ⴰⴾⴰⵍ ⵜⴰⵏ ⵜⴰⵎⴰⵏⵗⴰⵙⵜ) is a province (wilaya) in southern Algeria.

Tamanrasset is located in the deep southern region of Algeria, approximately 2,000 kilometers south of Algiers.

Tamanrasset is located in the heart of the Algerian Desert of the Sahara.

In general, the province has a hot desert climate (Köppen climate classification BWh), with very hot summers and mild winters, though more mountainous areas, such as the Hoggar Mountains, tend to have cooler temperatures compared to the flatter southern and western parts of the province.

The province is home to the highest peak in Algeria, Mount Tahat, located in the Hoggar Mountains with an elevation of 3,003 meters.