Firuz District (Persian: بخش فیروز) is in Kowsar County, Ardabil province, Iran. Its capital is the village of Firuzabad.

At the 2006 census, its population was 6,798 in 1,466 households. The following census in 2011 counted 6,185 people in 1,647 households. At the latest census in 2016, the district had 4,628 inhabitants living in 1,389 households.

Firuz District Population

Administrative Divisions	2006	2011	2016
Sanjabad-e Jonubi RD	3,211	3,054	2,395
Zarjabad RD	3,587	3,131	2,233
Total	6,798	6,185	4,628
RD = Rural District