Derna is a port city in eastern Libya. With a population of around 90,000, Derna was once the seat of one of the wealthiest provinces among the Barbary States. The city is now the administrative capital of Derna District, which covers a much smaller area than the old province. Among Libyan cities, Derna has a unique location and physical environment, as it lies between Jebel Akhdar, the Mediterranean Sea, and the desert and is the fourth most important port in Cyrenaica's northern coast after Benghazi, Bayda and Tobruk. The city is also home to people of many different backgrounds.

Derna is one of the districts of Libya. It is in the northeast of the country, in the historical region of Cyrenaica. Its capital is Derna. In 2007 the district was enlarged to include what had been the Al Qubah District. In the north, Derna has a shoreline on the Mediterranean Sea. On land, it borders Butnan in the east, Jabal al Akhdar in the west and Al Wahat to the south.