| Mahanaga | |
|---|---|
| Ruler of Ruhuna | |
| Reign | 3rd century BC |
| Successor | Yatala Tissa of Ruhuna |
| Spouse | Anula |
| Issue | Yatala Tissa of Ruhuna |
| House | Vijaya |
| Father | Mutasiva |
Mahanaga was an early monarch of Sri Lanka of the Kingdom of Ruhuna in the southern region of the island. He is the founder of the Ruhuna. The Kingdom of Ruhuna was in some periods a client state loyal to the King of Anuradhapura and in some periods a country independent of it.