Arentowo [arɛnˈtɔvɔ] is a village in the administrative district of Gmina Miasteczko Krajeńskie, within Piła County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) north-east of Miasteczko Krajeńskie, 21 km (13 mi) east of Piła, and 80 km (50 mi) north of the regional capital Poznań.