Tomaszewo [tɔmaˈʂɛvɔ] is a village in the administrative district of Gmina Dziemiany, within Kościerzyna County, Pomeranian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) north-east of Dziemiany, 16 km (10 mi) south-west of Kościerzyna, and 66 km (41 mi) south-west of the regional capital Gdańsk.

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