Sousse or Soussa is a city in Tunisia, capital of the Sousse Governorate. Located 140 km south of the capital Tunis, the city has 271,428 inha…Sousse or Soussa is a city in Tunisia, capital of the Sousse Governorate. Located 140 km south of the capital Tunis, the city has 271,428 inhabitants. Sousse is in the central-east of the country, on the Gulf of Hammamet, which is a part of the Mediterranean Sea. Its economy is based on transport equipment, processed food, olive oil, textiles, and tourism. It is home to the Université de Sousse.