Erymanthus or Erymanthos () may refer to:
Geography
- Erymanthos (municipality), a municipality of Achaea in the Peloponnese of Greece
- Erymanthos (river), a river in the Peloponnese
- Mount Erymanthos, a mountain range in Achaea and Elis, Peloponnese, Greece
- Erymanthus, an ancient Greek city of Arcadia later known as Psophis
Mythology
- Erymanthian Boar, a beast hunted by Heracles
- Erymanthus (mythology), name of several mythological figures
Biology
- Erymanthus (beetle), a checkered beetle genus in the subfamily Clerinae