Kosiorowo [kɔɕɔˈrɔvɔ] is a village in the administrative district of Gmina Świercze, within Pułtusk County, Masovian Voivodeship, in east-central Poland.

[1][2] It lies approximately 7 kilometres (4 mi) north-east of Świercze, 16 km (10 mi) west of Pułtusk, and 55 km (34 mi) north of Warsaw.

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