Leylan (Persian: ليلان)[a] is a city in Central District[b] of Leylan County, East Azerbaijan province, Iran, serving as capital of both the county[4] and the district.

[5] It was the administrative center for Leylan-e Jonubi Rural District[6][c] until its capital was transferred to the village of Turchi.

[4] The ancient Iranian town of Ganzak is identified as being near Leylan in the Miandoab plain.

At the time of the 2006 National Census, the city's population was 6,079 in 1,468 households,[9] when it was in Leylan District[d] of Malekan County.

[10] The 2016 census measured the population of the city as 6,356 people in 1,943 households.