Gunie-Ostrów [ˈɡuɲɛ ˈɔstruf] is a village in the administrative district of Gmina Kołaki Kościelne, within Zambrów County, Podlaskie Voivodeship, in north-eastern Poland.

[1] It lies approximately 10 kilometres (6 mi) east of Zambrów and 54 km (34 mi) west of the regional capital Białystok.

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