Brvnik (Serbian Cyrillic: Брвник) is a village in the municipalities of Domaljevac-Šamac, Posavina Canton and Šamac, Republika Srpska, Bosnia and Herzegovina.

[1] According to the 2013 census, its population was 296, with 256 living in the Šamac part[2] and 40 in the Domaljevac-Šamac part.

[3] This article about a location in the municipality of Šamac, Republika Srpska is a stub.

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