Grzmiąca [ˈɡʐmjɔnt͡sa] is a village in the administrative district of Gmina Wyśmierzyce, within Białobrzegi County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) west of Wyśmierzyce, 13 km (8 mi) west of Białobrzegi, and 69 km (43 mi) south of Warsaw.