Usora is a historic toponim of Bosnia and Herzegovina surrounding the river and the nearby area of the same name.

Throughout the dark ages/medieval period, name Usora represented a bannate/dukedom of its own, and it related to the territory that was stretching roughly from Kulasi and Prnjavor area to the west,Srebrenik and Lukavac area to the east, river Sava to the north and Zepce to the south. Usora had many strong fortresses and cities on its territory, the most famous ones being Doboj (12/13th ct.), Srebrenik (1333), Dobor (1387), Glaz (12th ct.), Soko (14th ct.), Tesanj (14th ct.), and Maglaj (15th ct.). Also, due to its geographical location(Pannonian plateau) as the northernmost Bosnian land and its richness, Usora was, more often than not, a most common battleground between Bosnian kingdom and Hungarian empire. The most famous ones were Battle of Dobor 1408 and the Battle of Doboj 1415. Several times this dukedom/bannate was separated from the rest of Bosnian kingdom (and attached to Hungary) temporarily, only to be reunited once again.

Today, this name belongs to a river in northern Bosnia and a southern suburb of the town of Doboj in Republika Srpska. The Municipality of Usora is a Bosnian Croat municipality in the Federation of Bosnia and Herzegovina. Doboj (Cyrilic: Добој) is a town in northern Bosnia, situated on the river Bosna. ... Official language Serbian, Bosnian and Croatian Official script Cyrillic alphabet, Latin alphabet Capital de jure Sarajevo de facto Banja Luka Area  â€“ Total  â€“ % water  24,811 km²  n/a Population  â€“ Total (2005)  â€“ Density  1,411,000  60/km² Ethnic groups (2005 est. ... The Municipality of Usora (Općina Usora/Општина Усора) is a rural municipality in the Federation of Bosnia and Herzegovina with a Bosnian Croat majority. ... This article is in need of attention. ...