Kosztowo [kɔʂˈtɔvɔ] is a village in the administrative district of Gmina Wyrzysk, within Piła County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) west of Wyrzysk, 32 km (20 mi) east of Piła, and 88 km (55 mi) north of the regional capital Poznań.