El Kef (Tunisian Arabic: الكاف‎ About this sound il-kāf), also known as Le Kef, is a city in north western Tunisia and the capital of the Kef Governorate.Situated 175 kilometres (109 mi) to the west of Tunis and some 40 kilometres (25 mi) east of the border between Algeria and Tunisia, El Kef has a population of 45,191 (2004 census). The old town is built on the cliff face of the table-top Jebel Dyr mountain. El Kef was the provisional capital of Tunisia during World War II.