Avlon or Avlonas () is a former municipality in Euboea, Greece. Since the 2011 local government reform it is part of the municipality Kymi-Aliveri, of which it is a municipal unit. The municipal unit has an area of 143.406 km<sup>2</sup>. In 2021 its population was 4,027. The seat of the municipality was in Avlonari.
The municipal unit Avlon is subdivided into the following communities (constituent villages in brackets):