Siennica, Nowy Dwór Mazowiecki County

Siennica is a village in the administrative district of Gmina Nasielsk, within Nowy Dwór County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 km south of Nasielsk, 18 km north-east of Nowy Dwór Mazowiecki, and 43 km north of Warsaw.