 The voivodeship was established on January 1, 1999, out of the former voivodeships of Gdańsk, Elbląg and Słupsk, pursuant to the Polish local government reforms adopted in 1997.It is bordered by West Pomeranian Voivodeship to the west, Greater Poland and Kuyavian-Pomeranian Voivodeships to the south, Warmian-Masurian Voivodeship to the east, and the Baltic Sea to the north.It also shares a short land border with Russia (Kaliningrad Oblast), on the Vistula Spit.