The Central District of Nir County () is in Ardabil province, Iran. Its capital is the city of Nir.
Yurtchi-ye Gharbi Rural District was separated from Kuraim District to join the Central District in 2019.
At the time of the 2006 National Census, the district's population was 12,607 in 3,043 households. The following census in 2011 counted 13,348 people in 3,661 households. The 2016 census measured the population of the district as 12,190 inhabitants living in 3,720 households.