The Central District of Gonabad County () is in Razavi Khorasan province, Iran. Its capital is the city of Gonabad.
The village of Rushnavand was converted to a city in 2020.
At the time of the 2006 National Census, the district's population was 64,849 in 18,169 households. The following census in 2011 counted 69,773 people in 20,322 households. The 2016 census measured the population of the district as 76,427 inhabitants in 22,977 households.