Błotnik is a village in the administrative district of Gmina Cedry Wielkie, within Gdańsk County, Pomeranian Voivodeship, in northern Poland. It lies approximately north-east of Cedry Wielkie, east of Pruszcz Gdański, and south-east of the regional capital Gdańsk.
For details of the history of the region, see History of Pomerania.
The village has a population of 344.
Blotnik was formerly known as Schmerblock and was part of Kreis Danzig-Niederung during the existence of the Free City of Danzig ( German: Freie Stadt Danzig; Polish: Wolne Miasto Gdańsk) in the period from 1919 to 1939 and part of Nazi Germany from 1939 - 1945