Derbent (Russian: Дербе́нт; Azerbaijani: Dərbənd; Lezgian: Кьвевар; Avar: Дербенд), formerly romanized as Derbend, is a city in the Republic of Dagestan, Russia, located on the Caspian Sea, north of the Azerbaijani border. It is the southernmost city in Russia, and it is the second-most important city of Dagestan.