Puszcza Darżlubska (pronounced [puʂ'tʂa darʐlubska]) or Lasy Piaśnickie (English: Darżlubska Wilderness or Darżlubie / Piaśnica Forest), located in the northernmost part of Poland, is a Polish forests complex on the Baltic Sea, within the geographical region of Pobrzeże Kaszubskie;[1] on the south-side bordering the Tricity Landscape Park (Trójmiejski Park Krajobrazowy) from which it is separated by the Reda river.

The name of Puszcza Darżlubska comes from the nearby village of Darżlubie in the administrative district of Gmina Puck, north of Gdańsk.

Along with the rise of temperature, the flora of the tundra gave way to new forest ecosystems in which most prominent were birches (Betula), pines (Pinus) and hazel (Corylus).

[2] In spite of the scarcity of tourist trails, Puszcza Darżlubska, is also a good recreational area with many natural, historical and cultural artifacts and various points of interest for the visitors.

[2] The waves of Nazi German executions, known as the Mass murders in Piaśnica, of about 12,000–16,000 hostages (mostly members of Polish migrant workers families residing in interwar Germany and members of Polish intelligentsia), were committed between the fall of 1939 and spring of 1940 near the town of Wielka Piaśnica.