The Central District of Mianeh County () is in East Azerbaijan province, Iran. Its capital is the city of Mianeh.
The village of Achachi was converted to a city in 2013.
At the time of the 2006 National Census, the district's population was 126,668 in 31,418 households. The following census in 2011 counted 130,079 people in 36,137 households. The 2016 census measured the population of the district as 129,600 inhabitants in 39,924 households.