Sfax is a city in Tunisia, located 270 km southeast of Tunis. The city, founded in AD 849 on the ruins of Taparura, is the capital of the Sfax …Sfax is a city in Tunisia, located 270 km southeast of Tunis. The city, founded in AD 849 on the ruins of Taparura, is the capital of the Sfax Governorate, and a Mediterranean port. Sfax has a population of 341,999. Its main industries include phosphate, olive and nut processing, fishing and international trade. The city is the second-most populous in the country after the capital, Tunis.