Ostasze [ɔsˈtaʂɛ] is a village in the administrative district of Gmina Suraż, within Białystok County, Podlaskie Voivodeship, in north-eastern Poland.

[1] It lies approximately 9 kilometres (6 mi) east of Suraż and 22 km (14 mi) south of the regional capital Białystok.

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