The Central District of Varzaneh County () is in Isfahan province, Iran. Its capital is the city of Varzaneh.
In 2021, Bon Rud District was separated from Isfahan County in the establishment of Varzaneh County and renamed the Central District. The new county was divided into two districts of two rural districts each, with Varzaneh as its capital and only city at the time.
At the time of the 2006 National Census, the district's population (as Bon Rud District of Isfahan County) was 26,285 in 6,934 households. The following census in 2011 counted 27,687 people in 8,137 households. The 2016 census measured the population of the district as 29,718 inhabitants in 9,225 households.