The Central District of Delijan County () is in Markazi province, Iran. Its capital is the city of Delijan.
At the time of the 2006 National Census, the district's population was 43,388 in 12,578 households. The following census in 2011 counted 48,986 people in 14,879 households. The 2016 census measured the population of the district as 51,621 inhabitants in 16,453 households.