The Bosanka (Serbian Cyrillic: Босанка) is a right tributary of the Vrbanja river in Bosnia and Herzegovina.

It rises on the southern slopes of the mountain Uzlomac (about 800 m above sea level) in four streams.

The long history of the name it was Plitka rika, and village nearby to it, in this regard - Plitska (today Vrbanjci).

[3] On the slopes of one of Uzlomac’s southern peaks (about 800 m) separating the confluences of Vrbanja and Velika Usora.

On the eastern side of Vodalke are waterflows of Zmajevac, Pirizevac and Breska, and to the west: Jelovac, Pušića potok, Svinjara and Jošavka.