| Siennica | |
|---|---|
| Village | |
| Coordinates: 52°34′27″N 20°47′30″E / 52.57417°N 20.79167°E | |
| Country |
|
| Voivodeship | Masovian |
| County | Nowy Dwór Mazowiecki |
| Gmina | Nasielsk |
| Population | 360 |
Siennica [ɕenˈnit͡sa] is a village in the administrative district of Gmina Nasielsk, within Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) south of Nasielsk, 18 km (11 mi) north-east of Nowy Dwór Mazowiecki, and 43 km (27 mi) north of Warsaw.
The village has a population of 360.
Coordinates: 52°34′27″N 20°47′30″E / 52.57417°N 20.79167°E