Kulmaga [kulˈmaɡa] is a village in the administrative district of Gmina Smętowo Graniczne, within Starogard County, Pomeranian Voivodeship, in northern Poland. It lies approximately 3 kilometres (2 mi) east of Smętowo Graniczne, 29 km (18 mi) south-east of Starogard Gdański, and 70 km (43 mi) south of the regional capital Gdańsk.

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