| Rajčanka | |
| Source1 Location: | Strážovské vrchy |
| Mouth Coordinates: | 49.2352°N 18.7085°W |
| Length: | 46.6km (29miles) |
| Basin Size: | 359km2 |
Rajčanka or Rajčianka (Hungarian: Rajcsánka) is a river in northern Slovakia springing in Strážovské vrchy near Čičmany and pouring into Váh in Žilina. It is 46.6km (29miles) long and its basin size is 359km2.[1]
It forms the border of Lúčanská Malá Fatra Mountains and of Strážovské vrchy. 32 km of its length are navigable.
Cities along its course are: Rajec, Rajecké Teplice, Žilina.
The original name of the river was Lietava, later Žilinka and only after the founding of Rajec (the 14th century) also Rajčanka[2] (see also Etymology of Rajec).