Śluza-Krostkowo [ˈɕluza krɔstˈkɔvɔ] is a settlement in the administrative district of Gmina Szamocin, within Chodzież County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 10 kilometres (6 mi) north-east of Szamocin, 25 km (16 mi) north-east of Chodzież, and 79 km (49 mi) north of the regional capital Poznań.