Celmerostwo [t͡sɛlmɛˈrɔstfɔ] is a settlement in the administrative district of Gmina Trąbki Wielkie, within Gdańsk County, Pomeranian Voivodeship, in northern Poland. It lies approximately 12 kilometres (7 mi) south-west of Trąbki Wielkie, 23 km (14 mi) south-west of Pruszcz Gdański, and 32 km (20 mi) south-west of the regional capital Gdańsk.

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