| Jiul de Est | |
| Name Other: | Jiul Unguresc |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Hunedoara County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Tirici, Cimpa, Petrila, Petroșani, Iscroni |
| Length: | 29km (18miles) |
| Source1: | Șureanu Mountains |
| Mouth: | Jiu |
| Mouth Location: | Iscroni |
| Mouth Coordinates: | 45.3686°N 23.3678°W |
| Mouth Elevation: | 554m (1,818feet) |
| Basin Size: | 468km2 |
The Jiul de Est ("Eastern Jiu", previously also known as Romanian; Moldavian; Moldovan: Jiul Unguresc) is a headwater of the river Jiu in Romania. Its source is in the Șureanu Mountains. At its confluence with the Jiul de Vest in Iscroni, the Jiu is formed.[1] Its length is 29km (18miles) and its basin size is 468km2.
Romanian; Moldavian; Moldovan: Jiul means "the Jiu" (with the definite article).
The following rivers are tributaries to the river Jiul de Est: