| Osiek Piaseczny | |
|---|---|
| Village | |
| Coordinates: 52°48′N 19°56′E / 52.800°N 19.933°E | |
| Country |
|
| Voivodeship | Masovian |
| County | Sierpc |
| Gmina | Zawidz |
Osiek Piaseczny [ˈɔɕɛk pjaˈsɛt͡ʂnɨ] is a village in the administrative district of Gmina Zawidz, within Sierpc County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) east of Zawidz, 21 km (13 mi) south-east of Sierpc, and 98 km (61 mi) north-west of Warsaw.
Coordinates: 52°48′N 19°56′E / 52.800°N 19.933°E