[5] At the time of the 2006 census, the county's population was 186,159 in 52,869 households.

[6] The following census in 2011 counted 182,260 people in 53,107 households.

[7] The 2016 census measured the population of the county as 196,521 in 52,011 households.

[2] Semnan County's population history and administrative structure over three consecutive censuses are shown in the following table.

Media related to Semnan County at Wikimedia Commons Iran portal