Marianowo [marjaˈnɔvɔ] is a village in the administrative district of Gmina Sieraków, within Międzychód County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 3 kilometres (2 mi) north-west of Sieraków, 15 km (9 mi) north-east of Międzychód, and 65 km (40 mi) north-west of the regional capital Poznań.