Gorgan County () is in Golestan province, Iran. Its capital is the city of Gorgan.
The village of Jelin-e Olya was converted to the city of Jelin in 2007, and the village of Qoroq became a city in 2016.
At the time of the 2006 census, the county's population was 393,887 in 105,120 households. The following census in 2011 counted 462,455 people in 135,112 households. The 2016 census measured the population of the county as 480,541 in 150,649 households.
Gorgan County's population history and administrative structure over three consecutive censuses are shown in the following table.