Shahriar County (Persian: شهرستان شهریار) is in Tehran province, Iran.

[5] At the time of the 2006 census, the county's population was 1,044,707 in 273,826 households.

[7] The 2016 census measured the population of the county as 744,210 in 226,011 households.

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

According to the information of the State Meteorological Organization of tehran province, the long-term average annual rainfall of Shahriar County is around 217.3 mm[14] Media related to Shahriar County at Wikimedia Commons Iran portal