Avlonari (Greek: Αυλωνάρι) is a village and a community (unit) of the Municipality Kymi-Aliveri, in the eastern part of the Aegean island of Euboea, Greece.

It was the seat of the municipality of Avlon, and the medieval town and bishopric of Aulon, which remains a Latin Catholic titular see.

Modern Avlonari is usually identified with Avlon or Aulon (Greek: Αὐλών), a town and bishopric attested since the 9th century.

[2] Aulon appears in the Notitiae Episcopatuum, commencing with that of Byzantine Emperor Leo VI the Wise (r. 886–912) as a suffragan of the metropolitan see of Athens,[3] in the sway of the Patriarchate of Constantinople.

[2] The district was led by two captains (Capitanei Avalone), who had their seats on fortresses in the nearby heights of Cuppa and Potiri.