Budy Siennickie [ˈbudɨ ɕɛnˈnit͡skʲɛ] is a village in the administrative district of Gmina Nasielsk, within Nowy Dwór County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) south of Nasielsk, 15 km (9 mi) north-east of Nowy Dwór Mazowiecki, and 40 km (25 mi) north of Warsaw.