Wiercień Duży [ˈvjɛrt͡ɕɛɲ ˈduʐɨ] is a village in the administrative district of Gmina Siemiatycze, within Siemiatycze County, Podlaskie Voivodeship, in north-eastern Poland.

[1] It lies approximately 9 kilometres (6 mi) north of Siemiatycze and 72 km (45 mi) south of the regional capital Białystok.

In 2008 the village had a population of 120.

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