Debeljaci () is a village in the municipality of Banja Luka, Republika Srpska, Bosnia and Herzegovina.Official results from the book: Ethnic composition of Bosnia-Herzegovina population, by municipalities and settlements, 1991. census, Zavod za statistiku Bosne i Hercegovine - Bilten no.234, Sarajevo 1991.
Demographics Ethnic groups in the village include: 1,155 Serbs (94.75%) 47 Croats (3.86%) 17 Others (1.40%)
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