Celmerostwo [t͡sɛlmɛˈrɔstfɔ] is a settlement in the administrative district of Gmina Skarszewy, within Starogard County, Pomeranian Voivodeship, in northern Poland. It lies approximately 11 kilometres (7 mi) north-west of Skarszewy, 24 km (15 mi) north-west of Starogard Gdański, and 30 km (19 mi) south-west of the regional capital Gdańsk.

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