Shahmirzad District (Persian: بخش شهمیرزاد) is in Mehdishahr County, Semnan province, Iran.

[3] After the 2006 National Census, Mehdishahr District was separated from Semnan County in the establishment of Mehdishahr County, which was divided into two districts and three rural districts, with the city of Mehdishahr as its capital.

[3] At the time of the 2011 census, the district's population was 16,782 people in 4,908 households.

[4] The 2016 census measured the population of the district as 16,694 inhabitants in 5,695 households.

This Mehdishahr County location article is a stub.