Twardy Dół (Polish pronunciation: [ˈtfardɨ ˈduw]) is a settlement in the administrative district of Gmina Zblewo, within Starogard County, Pomeranian Voivodeship, in northern Poland. It lies approximately 5 kilometres (3 mi) south of Zblewo, 17 km (11 mi) south-west of Starogard Gdański, and 57 km (35 mi) south of the regional capital Gdańsk.

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