Rzewin [ˈʐɛvin] is a village in the administrative district of Gmina Baboszewo, within Płońsk County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) north of Baboszewo, 13 km (8 mi) north-west of Płońsk, and 76 km (47 mi) north-west of Warsaw.