| Ipeľ | |
| Subdivision Type1: | Countries |
| Subdivision Name1: | Slovakia and Hungary |
| Length: | 232km (144miles) |
| Discharge1 Location: | mouth |
| Discharge1 Min: | 3m3/s |
| Discharge1 Avg: | 21m3/s |
| Discharge1 Max: | 70m3/s |
| Source1 Location: | Lom nad Rimavicou, Slovakia |
| Mouth: | Danube River |
| Mouth Location: | Chľaba/Szob |
| Mouth Coordinates: | 47.8182°N 18.8485°W |
| Basin Size: | 5151km2 |
| Tributaries Right: | Tisovník, Krtíš, Krupinica, Štiavnica |
| Custom Label: | Progression |
The Ipeľ (Slovak; in Slovak pronounced as /ˈipeʎ/) or Ipoly (Hungarian) (German: Eipel, archaic Slovak: Jupoľ, Latin: Bolia[1] [2]) is a 232km (144miles) long river in Slovakia and Hungary, a tributary of the Danube River. Its source is in central Slovakia in the Slovak Ore Mountains. It flows south to the Hungarian border, and then southwest, west, and again south along the border until it flows into the Danube near Szob.
The Ipeľ flows through or creates the border of the Banská Bystrica and Nitra regions in Slovakia, and Nógrád and Pest counties in Hungary.
The following towns and villages are situated on the river, in downstream order: