| Pârâul Fierului | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Hunedoara County |
| Length: | 9km (06miles) |
| Source1: | Poiana Ruscă Mountains |
| Mouth: | Râul Galben |
| Mouth Coordinates: | 45.5914°N 22.6969°W |
| Basin Size: | 42km2 |
| Tributaries Left: | Lacuri |
The Pârâul Fierului (also: Valea Fierului) is a right tributary of the Râul Galben in Romania. It flows into the Râul Galben upstream from Ștei. Its length is 9km (06miles) and its basin size is 42km2.