Rud Zard District () is in Ramhormoz County, Khuzestan province, Iran. Its capital is the city of Rud Zard-e Mashin.
After the 2011 National Census, villages were separated from the Central District in the formation of Rud Zard District.
After the 2016 census, the village of Rud Zard-e Mashin was elevated to the status of a city.
At the time of the 2016 census, the district's population was 4,495 inhabitants in 1,152 households.