Souk Ahras is a municipality in Algeria. It is the capital of Souk Ahras Province. The Numidian city of Thagaste, on whose ruins Souk Ahras was built, was the birthplace of Augustine of Hippo and a center of Berber culture.

Souk Ahras is a province (wilaya) in the Aures region in Algeria, named after its capital, Souk Ahras. It stands on the border between Algeria and Tunisia. In 2008, Souk Ahras had a population of 440,299 people.