| Șicasău | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Harghita County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Liban, Șicasău |
| Length: | 20km (10miles) |
| Mouth: | Târnava Mare |
| Mouth Location: | Lake Zetea |
| Mouth Coordinates: | 46.473°N 25.414°W |
| Basin Size: | 155km2 |
| Tributaries Left: | Fagu Roșu, Sălămaș |
| Tributaries Right: | Soboșa, Botul |
The Șicasău is a left tributary of the river Târnava Mare in Romania. It discharges into the Zetea Reservoir (also: Lake Poiana Târnavei), which is drained by the Târnava Mare.[1] Its length is 20km (10miles) and its basin size is 155km2.