Osówka is a village in the administrative district of Gmina Tarnówka, within Z otów County, Greater Poland Voivodeship, in west-central Poland. It lies approximately 4 kilometres (2 mi) north-east of Tarnówka, 12 km (7 mi) west of Z otów, and 108 km (67 mi) north of the regional capital Pozna . Before 1945 the area was part of Germany. The village has a population of 210. Gmina Tarnówka is a rural gmina (administrative district) in Z otów County, Greater Poland Voivodeship, in west-central Poland. Its seat is the village of Tarnówka, which lies approximately 13 kilometres (8 mi) west of Z otów and 105 km (65 mi) north of the regional capital Pozna .