It is geographically located in eastern Krajina region, and the town is situated on the Lijevče plain, on the right bank of the Sava river across from Stara Gradiška, Croatia, and about 40 km (25 mi) north of Banja Luka.Following the outbreak of the First Serbian Uprising (1804), in the Sanjak of Smederevo (modern Central Serbia), the Jančić's Revolt broke out in the Gradiška region against the Ottoman government in the Bosnia Eyalet, following the erosion of the economic, national and religious rights of Serbs.After the war, the RS National Assembly changed the name, omitting bosanska ("Bosnian"), as was done with many other towns (Kostajnica, Dubica, Novi Grad, Petrovo, Šamac).In the night of 18 November 2004, Catholic priest and parson Kazimir Višaticki was murdered in the clergy house of the St. Roch parish in Gradiška.The following table gives a preview of total number of registered people employed in legal entities per their core activity (as of 2018):[4] Gradiška is twinned with:[5] Gradiška also cooperates with:[6] Una-Sana Central Bosnia Posavina Herzegovina-Neretva Tuzla West Herzegovina Zenica-Doboj Sarajevo Bosnian Podrinje Canton 10
Serbian Orthodox church in Gradiška.
Monument dedicated to the fallen Serb fighters of the
Bosnian War