Sad-e Gorgan () is a village in Mazraeh-ye Shomali Rural District of Voshmgir District in Aqqala County, Golestan province, Iran.
At the time of the 2006 National Census, the village's population, as Sadgorgan va Ettehad Seh, was 118 in 23 households. The following census in 2011 counted 74 people in 19 households, by which time the village was listed as Sad-e Gorgan. The 2016 census measured the population of the village as 109 people in 33 households.