| Geamărtălui | |
| Name Other: | Gemărtălui |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Dolj, Olt |
| Length: | 63km (39miles) |
| Source1: | Muierii Hill, Dolj County |
| Source1 Coordinates: | 44.7172°N 23.7681°W |
| Source1 Elevation: | 320m (1,050feet) |
| Mouth: | Olteț |
| Mouth Location: | Balș, Olt County |
| Mouth Coordinates: | 44.3592°N 24.1014°W |
| Mouth Elevation: | 123m (404feet) |
| Basin Size: | 421km2 |
The Geamărtălui (also: Gemărtălui) is a right tributary of the river Olteț in Romania. It discharges into the Olteț in the town Balș.[1] The following towns and villages are situated along the river, from source to mouth: Velești, Balota de Sus, Balota de Jos, Bușteni, Gaia, Murgași, Picăturile, Plopșorelu, Tabaci, Vulpeni, Gropșani, Găvănești, Dâmburile, Baldovinești and Balș. Its length is 63km (39miles) and its basin size is 421km2.
The following rivers are tributaries to the river Geamărtălui (from source to mouth):