Brvnik () is a village in the municipalities of Domaljevac-Šamac, Posavina Canton and Šamac, 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 According to the 2013 census, its population was 296, with 256 living in the Šamac part and 40 in the Domaljevac-Šamac part.
+ Ethnicity in 2013EthnicityNumberPercentage Serbs 283 95.6% Croats 3 1.0% Bosniaks 1 0.3% other/undeclared 9 3.0% Total 296 100%
References