The Central District of Miandorud County () is in Mazandaran province, Iran. Its capital is the city of Surak.
In 2010, Miandorud District was separated from Sari County in the establishment of Miandorud County, which was divided into two districts and five rural districts, with Surak as its capital and only city at the time.
At the time of the 2011 National Census, the district's population was 40,013 people in 11,872 households. The 2016 census measured the population of the district as 40,303 inhabitants in 13,224 households.