Saraju District () is in Maragheh County, East Azerbaijan province, Iran. Its capital is the city of Khodaju.
At the time of the 2006 National Census, the district's population was 22,498 in 4,514 households. The following census in 2011 counted 21,371 people in 5,628 households. The 2016 census measured the population of the district as 21,631 inhabitants in 6,593 households.