Avernus (disambiguation)

Avernus is a volcanic crater in Italy with significance for Roman mythology.

Avernus may also refer to:
 * Lake Avernus, a lake in Italy
 * Avernus Colles, a region on Mars
 * Australian torpedo boat Avernus, a ship
 * Avernus, a genus of spittlebugs in the family Aphrophoridae
 * Avernus, a fictional location in the Outer Planes of the Dungeons & Dragons universe, which appeared in adventure modules like Baldur's Gate: Descent into Avernus, or video games such as Neverwinter or Baldur's Gate III
 * Avernus, a fictional spaceship in the Helliconia series of science fiction novels