| Lunca Mare | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Harghita County |
| Length: | 16km (10miles) |
| Mouth: | Olt |
| Mouth Location: | Sândominic |
| Mouth Coordinates: | 46.5682°N 25.7913°W |
| Basin Size: | 54km2 |
| Tributaries Right: | Sadocuț |
| Custom Label: | River code |
| Custom Data: | VIII.1.5 |
The Lunca Mare is a right tributary of the river Olt in Romania. It discharges into the Olt in Sândominic.[1] Its length is 16km (10miles) and its basin size is 54km2.