Ribnik (Cyrillic: Рибник) is a village and a municipality in western Republika Srpska, Bosnia and Herzegovina. It is situated in the western part of the Republika Srpska entity and the southern part of the Bosanska Krajina region. Ribnik, formerly known as Srpski Ključ (Српски Кључ), was created from part of the pre-war municipality of Ključ (the other part of the pre-war municipality is now in the Federation of Bosnia and Herzegovina).

It is located between municipalities of Oštra Luka in the north, Banja Luka and Mrkonjić Grad in the east, Glamoč in the south, and Istočni Drvar, Bosanski Petrovac, and Ključ in the west.

In 1991, the population of Ribnik village numbered 2,183 people, of whom 2,133 (98%) were Serbs. (See: Serbs of Bosnia and Herzegovina)

In 2006, the majority of inhabitants of municipality were ethnic Serbs.

Coordinates: 44°27′N 16°49′E / 44.45°N 16.817°E / 44.45; 16.817

Bosnia and Herzegovina (ⁱ/ˈbɒzniə ən hɛrtsəɡoʊˈviːnə/; Bosnian, Croatian and Serbian: Bosna i Hercegovina, Cyrillic script: Босна и Херцеговина), sometimes called Bosnia-Herzegovina, or simply Bosnia, is a country in Southeastern Europe, on the Balkan Peninsula. Its capital and largest city is Sarajevo. Bordered by Croatia to the north, west and south, Serbia to the east, and Montenegro to the southeast, Bosnia and Herzegovina is almost landlocked, except for the 20 kilometres (12 miles) of coastline on the Adriatic Sea surrounding the town of Neum. In the central and southern interior of the country the geography is mountainous, in the northwest it is moderately hilly, and the northeast is predominantly flatland. The inland is a geographically larger region and has a moderate continental climate, bookended by hot summers and cold and snowy winters. The southern tip of the country has a Mediterranean climate and plain topography.

Herzegovina ( /ˌhɛərtsɨˈɡoʊvɨnə/ or /ˌhɜrtsəɡoʊˈviːnə/;Bosnian, Croatian and Serbian: Hercegovina, Serbian Cyrillic: Херцеговина, [xɛ̌rtsɛɡov̞ina]) is the southern region of Bosnia and Herzegovina. While there is no official border distinguishing it from the Bosnian region, it is generally accepted that the borders of the region are Croatia to the west, Montenegro to the south, the canton boundaries of the Herzegovina-Neretva Canton to the east, and Gornji Vakuf-Uskoplje to the north. Measurements of the area range from 11,419 km² (4,409 sq mi), or around 22% of the total area of the present-day country to 12,276 km² (4,740 sq mi), around 24% of the country.

The name Herzegovina means "duke's land", referring to the medieval duchy of Stjepan Vukčić Kosača who took title "Herzeg of Saint Sava". Herceg is derived from the German title Herzog.

While the population of Herzegovina throughout history has been ethnically mixed, the Bosnian War in the 1990s resulted in mass ethnic cleansing and large-scale displacement of peoples. The last pre-war census in 1991 recorded a population of 437,095 inhabitants.