Olszewka [ɔlˈʂɛfka] is a village in the administrative district of Gmina Nakło nad Notecią, within Nakło County, Kuyavian-Pomeranian Voivodeship, in north-central Poland.

[1] It lies approximately 4 kilometres (2 mi) west of Nakło nad Notecią and 31 km (19 mi) west of Bydgoszcz.

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