Other densely-populated provinces following Tehran are Gilan, Mazandaran, and Qom with 180.2, 137.7 and 113.1 people per square kilometer respectively, IRNA reported.
The least populated provinces after Semnan are Yazd with 8.8 and South Khorasan with 8.1 people.
The latest national census was carried out nationwide from September 24, 2016, in two stages of online and door-to-door registration, Mehr News Agency reported.
According to Financial Tribune, the door-to-door phase, which was the second phase, ended on November 18.