Siniavichy (, ) is a village in Grodno District, Grodno Region, in western Belarus. It is situated at the confluence of the Czarna Hańcza and Neman rivers.
History In 1827, it had a population of 63.
In the interwar period, Sieniewicze, as it was known in Polish, was administratively located in the Augustów County in the Białystok Voivodeship of Poland. According to the 1921 census, the village had a population of 176, entirely Polish by nationality and Catholic by confession.
Following the invasion of Poland in September 1939, the village was first occupied by the Soviet Union until 1941, then by Nazi Germany until 1944, and then re-occupied by the Soviet Union, which eventually annexed it from Poland in 1945.
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