Badowo-Mściska [baˈdɔvɔ ˈmɕt͡ɕiska] is a village in the administrative district of Gmina Mszczonów, within Żyrardów County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) south-east of Mszczonów, 13 km (8 mi) south-east of Żyrardów, and 42 km (26 mi) south-west of Warsaw.