Trosowo [trɔˈsɔvɔ] is a settlement in the administrative district of Gmina Zblewo, within Starogard County, Pomeranian Voivodeship, in northern Poland. It lies approximately 6 kilometres (4 mi) west of Zblewo, 19 km (12 mi) west of Starogard Gdański, and 55 km (34 mi) south-west of the regional capital Gdańsk.

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