At the time of the 2006 National Census, the village's population was 737 in 158 households, when it was in the former Margown District of Boyer-Ahmad County.[4] The following census in 2011 counted 886 people in 202 households.[5] The 2016 census measured the population of the village as 781 people in 200 households. It was the most populous village in its rural district.[2]
In October 2018, the district was separated from the county in the establishment of Margown County. The rural district was transferred to the new Central District.[6]
^Shahniz can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3769620" in the "Unique Feature Id" form, and clicking on "Search Database".