Sers, also Le Sers or Es Sers, is a town and commune in the Kef Governorate, Tunisia. It is located 35.5 kilometres by road southeast …Sers, also Le Sers or Es Sers, is a town and commune in the Kef Governorate, Tunisia. It is located 35.5 kilometres by road southeast of El Kef. As of 2004 it had a population of 11,927. Its economic activity is mainly dominated by agriculture, including cereal production.