The Central District of Tonekabon County () is in Mazandaran province, Iran. Its capital is the city of Tonekabon.
The village of Shirud was converted to a city upon the merger of 19 villages in 2008.
At the time of the 2006 National Census, the district's population was 85,739 in 25,304 households. The following census in 2011 counted 88,947 people in 28,549 households. The 2016 census measured the population of the district as 99,190 inhabitants in 33,808 households.