The Central District of Sorkheh County () is in Semnan province, Iran. Its capital is the village of Lasjerd. The previous capital of the district was the city of Sorkheh.
In 2012, Sorkheh District was separated from Semnan County in the establishment of Sorkheh County, which was divided into one district of two rural districts, with Sorkheh as its capital and only city at the time. In 2021, Emamzadeh Abdollah Rural District was created in the district, and Hafdar Rural District was separated from it in the formation of Hafdar District.
At the time of the 2006 National Census, the district's population, as Sorkheh District of Semnan County, was 14,194 in 4,195 households. The following census in 2011 counted 14,853 people in 4,659 households. The 2016 census measured the population of the district as 15,523 in 5,330 households.