Ismayilli District (Azerbaijani: İsmayıllı rayonu) is one of the 66 districts of Azerbaijan. It is located in the north of the country and belongs to the Mountainous Shirvan Economic Region. The district borders the districts of Qabala, Quba, Goychay, Kurdamir, Agsu, Shamakhi, and the Russian Republic of Dagestan. Its capital and largest city is Ismayilli. As of 2020, the district had a population of 87,400. It is believed that this district was named after a highly respected elder and philanthropist in the community, Ismayil Baghiyev.