Dubno is a village in the administrative district of Gmina Boćki, within Bielsk County, Podlaskie Voivodeship, in eastern Poland.
History In early 17th century, voivode Mikołaj Sapieha erected a mansion in Dubno with four steeples, utterly destroyed during the Swedish Deluge. In late 18th century, the Potocki family built there one of the first sugar refinery plants in Poland.Karwowska H., Andrzejewski A. Rezydencja Sapiehów w Dubnie, vol. II, Muzeum Podlaskie w Białymstoku, Instytut Archeologii UŁ, Białystok 2007, .
According to the 1921 census, the village was inhabited by 317 people, among whom 12 were Roman Catholic, 292 Orthodox, 9 Jewish and 4 different. At the same time, 10 inhabitants declared Polish nationality, 298 Belarusian and 9 Jewish. There were 31 residential buildings in the village.Skorowidz miejscowości Rzeczypospolitej Polskiej: opracowany na podstawie wyników pierwszego powszechnego spisu ludności z dn. 30 września 1921 r. i innych źródeł urzędowych., t. T. 5, województwo białostockie, 1924, s. 19.
Three Polish citizens were murdered by Nazi Germany in the village during World War II.
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