Olenus (disambiguation)

Olenus is one of a number of figures in Greek mythology.

Olenus may also refer to:
 * Olenus (Achaea), a city of ancient Achaea, Greece
 * Olenus (Aetolia), a city of ancient Aetolia, Greece
 * Olenus (Galatia), a city of ancient Galatia, now in Turkey
 * Olenus (trilobite), a genus of trilobites