Nireus (disambiguation)

Nireus is a name that may refer to:


 * Nireus (Νιρεύς), in Greek mythology:
 * Nireus, king of Syme
 * Nireus, a son of Poseidon and Canace
 * Nireus, a companion of Heracles
 * 173086 Nireus, an asteroid
 * Nireus, a Type 209 submarine of the Hellenic Navy
 * Papilio nireus, a species of butterfly