Kostajnica can refer to:
The Vrbas Banovina or Vrbas Banate, was a province (banovina) of the Kingdom of Yugoslavia between 1929 and 1941. It was named after the Vrbas River and consisted mostly of territory in western Bosnia with its capital at Banja Luka. Dvor district of present-day Croatia was also part of the Vrbas Banovina.
The Una is a border river between Bosnia and Herzegovina and Croatia and a right tributary of the Sava river. It is part of the Black Sea drainage basin, and its watershed has a size of 10,200 km2 (3,900 sq mi), of which 8,080 km2 (3,120 sq mi) belongs to Bosnia and Herzegovina, and 2,120 km2 (820 sq mi) to Croatia. The total length of the river is 212 km (132 mi). The source of the river is located in the town of Donja Suvaja in Croatia, and its mouth is located near the town of Jasenovac, on the border with Bosnia. The largest right tributaries are the Krka, Unac, Krušnica and Sana rivers, and the largest left tributary is the Klokot river. Its longest headwater is the Unac river. The largest and most important city located on the river is Bihać. Other, important cities and towns are Bosanska Krupa, Bosanski Novi and Bosanska Kostajnica. The river is characterized by a multitude of waterfalls, rapids, karst springs and relatively untouched nature. A large part of the upper river is part of the Una National Park.

Gradiška, formerly Bosanska Gradiška, is a city of northwestern Bosnia and Herzegovina, located in Republika Srpska entity. As of 2013, it has a population of 51,727 inhabitants, while the city of Gradiška has a population of 14,368 inhabitants.
Gračanica is a city located in Tuzla Canton of the Federation of Bosnia and Herzegovina, an entity of Bosnia and Herzegovina. It is located in northeastern Bosnia and Herzegovina, east of Doboj and west of Tuzla. As of 2013, it has a population of 45,220 inhabitants.
Novi Grad, formerly Bosanski Novi, is a town and municipality in Bosnia and Herzegovina. Administratively, it is located in the Republika Srpska entity. Situated in the far northwest of the country, it lies across the Una from the Croatian town of Dvor. According to the 2013 census, the town has a population of 11,063 while its municipality comprises a total of 27,115 inhabitants.
In Bosnia and Herzegovina, the smallest administrative unit is the municipality. Prior to the 1992–95 Bosnian War there were 109 municipalities in what was then Socialist Republic of Bosnia and Herzegovina. Ten of these formed the area of the capital Sarajevo.
Kula may refer to:
Bosanska Kostajnica is a town - city and municipality of northern Bosnia and Herzegovina, located in the Republika Srpska entity. It is situated in the part of the Кrajina region. As of 2013, it had a population of 5,977 inhabitants, while the town of Kostajnica has a population of 4,047 inhabitants.
Prnjavor is a common South Slavic placename, meaning "village on a monastery's property". It can refer to the following places:
Konjic is a City and a town located in the Herzegovina-Neretva Canton of the Federation of Bosnia and Herzegovina, one of two entities that make up Bosnia and Herzegovina. It is located in northern Herzegovina, around 60 kilometres (37 mi) southwest of Sarajevo, in a mountainous, heavily wooded area, and is 268 m (879 ft) above sea level. The municipality extends on both sides of the Neretva River. According to the 2013 census, the city of Konjic has a population of 10,732 inhabitants, whereas the municipality has 25,148.
Glavatičevo is a small village in Konjic Municipality, Bosnia and Herzegovina, which is a central village to a group of villages of a wider Glavatičevo, positioned 30 km southeast of Konjic, within a wide Župa Valley straddling the Neretva river. The village and its wider areal, with surrounding villages and the valley, is also referred to as Župa Glavatičevo, or Komska Župa, or simply Župa (transl. parish).
Kostajnica Fortress is a castle in Hrvatska Kostajnica, a town in central Croatia, near the border to Bosnia and Herzegovina.
Upper Neretva, is the upper course of the Neretva river, including vast mountainous area surrounding the Neretva, with numerous human settlements, peaks and forests, numerous streams and well-springs, three major glacial lakes near the river and even more scattered across the mountains of Treskavica and Zelengora, in a wider area of the Upper Neretva with its flora and fauna.
Kostajnica is a village in the municipality of Doboj, Bosnia and Herzegovina.
Kostajnica is a village in the municipality of Konjic, Bosnia and Herzegovina.
Kruščica, which translates as Pear from Serbo-Croatian may refer to:
Bijela, or also Bijela rijeka in case of rivers, may refer to:
Bukovica may refer to:
Žabljak is a town in Montenegro.