| Tarcău | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Neamț County |
| Length: | 33km (21miles) |
| Source1: | Mount Grindușul |
| Source1 Location: | Tarcău Mountains |
| Source1 Coordinates: | 46.6458°N 26.1533°W |
| Source1 Elevation: | 1537m (5,043feet) |
| Mouth: | Bistrița |
| Mouth Location: | Tarcău |
| Mouth Coordinates: | 46.8914°N 26.1361°W |
| Mouth Elevation: | 403m (1,322feet) |
| Basin Size: | 392km2 |
The Tarcău (hu|Tarkő) is a right tributary of the river Bistrița in Romania.[1] It discharges into the Bistrița in the village Tarcău.[2] It flows through the villages Ardeluța, Schitu Tarcău, Brateș, Cazaci and Tarcău. Its length is 33km (21miles) and its basin size is 392km2.[3]
The Hungarian name means "baldstone". The Romanian name derives from that.
The following rivers are tributaries to the river Tarcău: