Sang Bijar () is a village in Rud Pish Rural District of the Central District in Fuman County, Gilan province, Iran.
At the time of the 2006 National Census, the village's population was 805 in 212 households. The following census in 2011 counted 540 people in 165 households. The 2016 census measured the population of the village as 660 people in 224 households.