Nowy Dwór Gdański County (Polish: powiat nowodworski) is a unit of territorial administration and local government (powiat) in Pomeranian Voivodeship, northern Poland, on the Baltic coast.

It came into being on 1 January 1999 as a result of the Polish local government reforms passed in 1998.

Its administrative seat and largest town is Nowy Dwór Gdański, which lies 36 kilometres (22 mi) south-east of the regional capital Gdańsk.

The only other town in the county is Krynica Morska, lying 29 km (18 mi) north-east of Nowy Dwór Gdański, on the Vistula Spit.

It also has a short land border with Russia (Kaliningrad Oblast) to the north-east, on the Vistula Spit.