Nakwasin [nakˈfaɕin] is a village in the administrative district of Gmina Mała Wieś, within Płock County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) north-east of Mała Wieś, 33 km (21 mi) east of Płock, and 64 km (40 mi) north-west of Warsaw.