Łasinek [waˈɕinɛk] is a settlement in the administrative district of Gmina Stara Kiszewa, within Kościerzyna County, Pomeranian Voivodeship, in northern Poland. It lies approximately 9 kilometres (6 mi) west of Stara Kiszewa, 13 km (8 mi) south of Kościerzyna, and 55 km (34 mi) south-west of the regional capital Gdańsk.

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