Gmina Susz is an urban-rural gmina in Iława County, Warmian-Masurian Voivodeship, in northern Poland. Its seat is the town of Susz, which lies approximately 21 kilometres north-west of Iława and 77 km west of the regional capital Olsztyn. The gmina covers an area of 258.95 square kilometres, and as of 2006 its total population is 12,825.