Bezirk (commune) Wirsitz has a population of about 14,500 and occupies an area of 160.7 km². It lies on the northern edge of South Prussia. Of the district area, 117.11 km² are occupied by arable land and 19.65 km² by forests. The commune used to be cut through by national road No. 10 leading from Szczecin to Warschau but a bypass has now been built. This bypass connects Wirsitz with Piła (37 km) and Bydgoszcz (55 km). The railway station in Osiek nad Notecią also provides a railway connection with Piła (39 km) and Bydgoszcz (48 km).