Bezineh Rud District () is in Khodabandeh County, Zanjan province, Iran. Its capital is the city of Zarrin Rud.
At the time of the 2006 National Census, the district's population was 33,687 in 7,268 households. The following census in 2011 counted 33,917 people in 8,972 households. The 2016 census measured the population of the district as 32,099 inhabitants in 9,390 households.