Sieburczyn [ɕɛˈburt͡ʂɨn] is a village in the administrative district of Gmina Wizna, within Łomża County, Podlaskie Voivodeship, in north-eastern Poland.

[1] It lies approximately 6 kilometres (4 mi) north-east of Wizna, 26 km (16 mi) east of Łomża, and 50 km (31 mi) west of the regional capital Białystok.

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