|Administrative region||East Macedonia and Thrace|
|Time zone||EET (UTC+2)|
|• Summer (DST)||EEST (UTC+3)|
Avas or Avantas (Greek, modern: Άβαντας, katharevousa: Άβας, Bulgarian: Дервент, Turkish: Dervent) is a village in the southern part of the Evros regional unit, Greece. Avantas is located 10 km north of Alexandroupoli. It is on the Greek National Road 53 (Alexandroupoli - Mikro Dereio - Ormenio), between Alexandroupoli to the south and Aisymi to the north. In 2011 its population was 527.
The village was founded by the Ottoman Turks. Its inhabitants were 3/4 Bulgarian and 1/4 Turkish before the Balkan Wars and the Greco-Turkish War (1919-1922). According to professor Lyubomir Miletich, the 1912 population contained 320 Bulgarian families. Refugees from east of the Evros river and from Asia Minor arrived into the village. Its name was changed from the Turkish Dervent to the current Avas.
- "Απογραφή Πληθυσμού - Κατοικιών 2011. ΜΟΝΙΜΟΣ Πληθυσμός" (in Greek). Hellenic Statistical Authority.
- Любомиръ Милетич. Разорението на тракийскитe българи през 1913 година, Българска Академия на Науките, София, Държавна Печатница, 1918, стр. 295.