The county was created, as a result of local pressure, in 2002. The area was previously part of Malbork County.
The county covers an area of . As of 2006 its total population is 41,808, out of which the population of Sztum is 9,945, that of Dzierzgoń is 5,630, and the rural population is 26,233.
Sztum County on a map of the counties of Pomeranian Voivodeship
Sztum County is bordered by Malbork County to the north, Elbląg County to the north-east, Ostróda County to the east, Iława County to the south-east, Kwidzyn County to the south and Tczew County to the west.