Niździn [ˈniʑd͡ʑin] is a village in the administrative district of Gmina Mała Wieś, within Płock County, Masovian Voivodeship, in east-central Poland. It lies approximately 1 kilometre (1 mi) west of Mała Wieś, 29 km (18 mi) south-east of Płock, and 67 km (42 mi) north-west of Warsaw.