Agios Sergios (Greek: Άγιος Σέργιος "Saint Sergius"; Turkish: Yeni Boğaziçi "New Bosporus", previously Aysergi) is a large village in Cyprus, near Salamis. Agios Sergios is under the de facto control of Northern Cyprus. As of 2011, it had a population of 3,347.
In 1946, 1,790 people were living in Agios Sergios; 82 were Turkish- and the rest Greek Cypriots. All Turkish Cypriots fled to Famagusta and neighbouring villages in 1958. By 1973, Agios Sergios had an estimated population of 2,040. After 1974, it was reinhabited by some of its former Turkish-Cypriot residents, displaced Turkish Cypriots from the south of Cyprus, and Turkish settlers from Istanbul and Trabzon.