Usora near Teslic in the village of Ručunga
|location||Bosnia and Herzegovina|
|Drain over||Bosna → Save → Danube → Black Sea|
|origin||Confluence of the Velika Usora and the Mala Usora in the town of Teslić
|muzzle||south of Doboj in Bosna
|Catchment area||849.3 km²|
The Usora ( Serbian - Cyrillic Усора ) is a river in central-northern Bosnia and Herzegovina . The Usora is formed by the confluence of the Velika Usora and the Mala Usora in the town of Teslić . The Usora flows south of Doboj as a left tributary into the Bosna . It has a length of 76.3 km and a catchment area of 849.3 km².