Walentynowo [valɛntɨˈnɔvɔ] is a village in the administrative district of Gmina Łobżenica, within Piła County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 5 kilometres (3 mi) north-west of Łobżenica, 37 km (23 mi) north-east of Piła, and 102 km (63 mi) north of the regional capital Poznań.