Kostrzyn [ˈkɔstʂɨn] is a village in the administrative district of Gmina Wyśmierzyce, within Białobrzegi County, Masovian Voivodeship, in east-central Poland.

[1] It lies approximately 14 kilometres (9 mi) south-west of Wyśmierzyce, 24 km (15 mi) south-west of Białobrzegi, and 78 km (48 mi) south of Warsaw.

Kostrzyn was a private village of Polish nobility, administratively located in the Radom County in the Sandomierz Voivodeship in the Lesser Poland Province.

[2] In 1827, the village had a population of 85.

This Białobrzegi County location article is a stub.