Promnik [ˈprɔmnik] is a village in the administrative district of Gmina Nowe Miasto nad Pilicą, within Grójec County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) north-east of Nowe Miasto nad Pilicą, 28 km (17 mi) south-west of Grójec, and 67 km (42 mi) south of Warsaw.