| Blahnița | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Mehedinți County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Izvoru Aneștilor, Livezile, Rogova, Pătulele, Balta Verde |
| Length: | 56km (35miles) |
| Mouth: | Danube |
| Mouth Coordinates: | 44.3483°N 22.5521°W |
| Basin Size: | 555km2 |
| Tributaries Left: | Poroinița, Orevița |
The Blahnița is a left tributary of the Danube in Romania. It flows into the Danube near Balta Verde.[1] Its length is 56km (35miles) and its basin size is 555km2.