Gmina Gostynin is a rural gmina (administrative district) in Gostynin County, Masovian Voivodeship, in east-central Poland. Its seat is the town of Gostynin, although the town is not part of the territory of the gmina.
The gmina covers an area of , and as of 2006 its total population is 12,245.
The gmina contains part of the protected area called Gostynin-Wà Âocà Âawek Landscape Park.
Gmina Gostynin contains the villages and settlements of:
Gmina Gostynin is bordered by the town of Gostynin and by the gminas of Baruchowo, à Âàck, à ÂaniÃÂta, Lubieà  Kujawski, Nowy Duninów, Strzelce and Szczawin Koà Âcielny.