Pierwoszyńskie Pustki [pjɛrvɔˈʂɨɲskʲɛ ˈpustki] is a former settlement in the administrative district of Gmina Kosakowo, within Puck County, Pomeranian Voivodeship, in northern Poland. It lies approximately 2 kilometres (1 mi) east of Kosakowo, 14 km (9 mi) south-east of Puck, and 27 km (17 mi) north of the regional capital Gdańsk.

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