| Slănic | |
| Name Other: | Slănic de Gura Ocniței |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Dâmbovița County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Ocnița, Gura Ocniței, Săcueni |
| Length: | 30km (20miles) |
| Mouth: | Ialomița |
| Mouth Location: | Comișani |
| Mouth Coordinates: | 44.8834°N 25.6007°W |
| Basin Size: | 82km2 |
| Tributaries Left: | Ocnița |
| Tributaries Right: | Răzvădeanca |
| Custom Label: | River code |
| Custom Data: | XI.1.11 |
The Slănic (sometimes referred to as Slănic de Gura Ocniței or Slănicul de Jos to distinguish it from other rivers named Slănic) is a left tributary of the river Ialomița in Romania. It discharges into the Ialomița in Comișani.[1] Its length is 30km (20miles) and its basin size is 82km2.