| Wiar River | |
| River | |
 The Wiar River near Nyzhankovychi
| |
| Countries | Poland, Ukraine |
|---|---|
| Tributaries | |
| - left | Zalissia River |
| - right | Bibiska Mala Vyrva Bukhta Vyrva |
| Source | Mount Brańcowa |
| - location | Jureczkowa, Bieszczady County, Subcarpathian Voivodeship, Poland |
| - elevation | 620 m (2,034 ft) |
| Mouth | San |
| - location | Przemyśl, Subcarpathian Voivodeship, Poland |
| Length | 70.4 km (44 mi) |
| Basin | 798.2 km² (308 sq mi) |
| Discharge | |
| - average | 6 m3/s (212 cu ft/s) |
Wiar or Vihor is a left tributary of the San River in southeastern Poland and Ukraine. It flows for 70.4 kilometres.
Tributaries[]
- Left
- Zalissia River
- Right
- Bibiska
- Mala Vyrva
- Bukhta
- Vyrva
- Arlamivka (left)
- Chyzhka (right)