Osieczyce is an abandoned settlement in the administrative district of Gmina Lubniewice, part of Sulęcin County, Lubusz Voivodeship, in western Poland. It lies approximately 7 kilometres (4 mi) south of Lubniewice, 12 km (7 mi) east of Sulęcin, 31 km (19 mi) south of Gorzów Wielkopolski, and 60 km (37 mi) north of Zielona Góra.