| Sienno | |
|---|---|
| Village | |
| Coordinates: 52°23′N 18°0′E / 52.383°N 18.000°E | |
| Country |
|
| Voivodeship | Greater Poland |
| County | Słupca |
| Gmina | Ostrowite |
Sienno [ˈɕennɔ] is a village in the administrative district of Gmina Ostrowite, within Słupca County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) west of Ostrowite, 13 km (8 mi) north-east of Słupca, and 74 km (46 mi) east of the regional capital Poznań.
Coordinates: 52°23′00″N 18°00′00″E / 52.3833°N 18.0000°E