Sefid Tameshk () is a village in Sakht Sar 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 634 in 183 households. The following census in 2011 counted 578 people in 179 households. The 2016 census measured the population of the village as 618 people in 211 households.