The Iványi (Hungarian: Iványi-patak) originates in the Mátra range at nearly 470 metres above sea level, south of Mátraterenye, Nógrád County, Hungary. It is a left tributary of the Zagyva. The stream flows northward and reaches the Zagyva north of Mátramindszent.
| Iványi | |
|---|---|
 | |
| Location | |
| Country | Hungary |
| Physical characteristics | |
| Source | |
| • location | Mátra, Hungary |
| • elevation | 470 m (1,540 ft) |
| Mouth | |
• location | Zagyva, Mátraterenye |
• coordinates | 48°00′19″N 19°56′07″E / 48.00538°N 19.93516°E |
| Basin features | |
| Progression | Zagyva→ Tisza→ Danube→ Black Sea |
The Tószeri flows into it not far from Mátraterenye.