Osiewo [ɔˈɕɛvɔ] is a settlement in the administrative district of Gmina Stary Targ, within Sztum County, Pomeranian Voivodeship, in northern Poland. It lies approximately 9 kilometres (6 mi) north of Stary Targ, 11 km (7 mi) north-east of Sztum, and 52 km (32 mi) south-east of the regional capital Gdańsk.

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