Martąg [ˈmartɔnk] is a village in the administrative district of Gmina Nowy Staw, within Malbork County, Pomeranian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) south-east of Nowy Staw, 8 km (5 mi) north of Malbork, and 41 km (25 mi) south-east of the regional capital Gdańsk.

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