| Biertan | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Sibiu County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Biertan |
| Length: | 17km (11miles) |
| Mouth: | Târnava Mare |
| Mouth Location: | Șaroș pe Târnave |
| Mouth Coordinates: | 46.2139°N 24.5347°W |
| Basin Size: | 58km2 |
| Tributaries Left: | Richiș |
The Biertan (Hungarian: Berethalom) is a left tributary of the river Târnava Mare in Romania. It discharges into the Târnava Mare in Șaroș pe Târnave near Dumbrăveni.[1] Its length is 17km (11miles) and its basin size is 58km2.