Separ Deh () is a village in Eshkevar Rural District of the Central District in Ramsar County, Mazandaran province, Iran.
At the time of the 2006 National Census, the village's population was 381 in 115 households. The following census in 2011 counted 328 people in 106 households. The 2016 census measured the population of the village as 210 people in 77 households.