Lubieszynek [lubjɛˈʂɨnɛk] is a village in the administrative district of Gmina Liniewo, within Kościerzyna County, Pomeranian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) north of Liniewo, 15 km (9 mi) east of Kościerzyna, and 41 km (25 mi) south-west of the regional capital Gdańsk.

For details of the history of the region, see History of Pomerania.