| Valea Mare | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Constanța County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Cetatea, Văleni, Rariștea, Viile |
| Length: | 29km (18miles) |
| Mouth: | Danube |
| Mouth Location: | Dunăreni |
| Mouth Coordinates: | 44.2161°N 27.7691°W |
| Basin Size: | 344km2 |
| Tributaries Left: | Dobromir, Negureni |
| Tributaries Right: | Corvin, Valea Floriilor |
| Custom Label: | River code |
| Custom Data: | XIV.1.39a |
The Valea Mare (also: Valea Negrenilor) is a right tributary of the Danube in Romania.[1] It passes through Lake Dunăreni and flows into the Danube near Dunăreni. Its length is 29km (18miles) and its basin size is 344km2.