| Ilva | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bistrița-Năsăud County |
| Length: | 51km (32miles) |
| Mouth: | Someșul Mare |
| Mouth Location: | Ilva Mică |
| Mouth Coordinates: | 47.3146°N 24.6489°W |
| Basin Size: | 419km2 |
| Tributaries Left: | Ivăneasa, Arșița, Leșu, Strâmba |
| Tributaries Right: | Silhoasa, Bolovan, Ursoaia, Cucureasa |
The Ilva is a left tributary of the river Someșul Mare in Romania. Its source is near the village Piatra Fântânele and the Tihuța Pass. It flows through the villages Lunca Ilvei, Ilva Mare, Măgura Ilvei and Poiana Ilvei. It discharges into the Someșul Mare in Ilva Mică.[1] Its length is 51km (32miles) and its basin size is 419km2.