Firuzabad District () is in Selseleh County, Lorestan province, Iran. Its capital is the city of Firuzabad.
At the time of the 2006 National Census, the district's population was 17,201 in 3,579 households. The following census in 2011 counted 16,084 people in 3,956 households. The 2016 census measured the population of the district as 16,168 inhabitants in 4,533 households.