Beylagan District () is one of the 66 districts of Azerbaijan. It is located in the centre of the country and belongs to the Central Aran Economic Region. The district borders the districts of Fuzuli, Aghjabadi, Zardab, Imishli, and the Ardabil Province of Iran. Its capital and largest city is Beylagan. As of 2020, the district had a population of 99,500. Etymology The name Beylagan historically used in different forms particularly, Paytakaran, Balasakan, Bilgan, Millar and Beylagan. A number of considerations associated with the toponymy of Beylagan. In accordance with the historical name “Beylagan” derived from the words “pila” (valley) and “gan” (place) and corresponds to the meaning of field or valley. Another view claims that Beylagan historically situated on the Barda – Ardabil trade way. Because of that reason, the city became one of the main trade centres in the 9th – 12th centuries. The toponymy “Beylagan” interrelated to that historical base, which means trade way or the place where trading took place. According to the other statements the toponymy is related to the name of the “bel” tribe who lived there at that time. “Beylagan” means the place where “bel” tribes are settled regarding that view. History There is mention of the name of the district in various historical books. One of the “Roads and Countries” is written by Naila Valikhanli. Dimensions of the main historical trade ways are indicated in that book. At the same time, an indication of the route from Greece to Beylagan shows the significance of the city. According to the sources, the north–south line (Derbent – Ardabil road) of the Silk Road passed through Beylagan. Traders of the city built relations with China, India, Iran, Georgia and Byzantium through thanks to this geophysical condition. In accordance with the historical sources, Beylagan was founded in the 5th century. In the 13th century, the city was completely destroyed by Mongol invasions. Reconstruction of Beylagan started by Amir Teymur in the 14th century but after his death works in that territory stopped. Ancient Beylagan city was ruined in the 16th century and has never been restored again. Beylagan district was founded on November 24, 1939, and was called Zhanov from 1939 to 1963. In 1963, the Beylagan District was liquidated and merged with the Imishli district. The name of the district was renamed Beylagan with regard to the 1989 dated decree of the Supreme Council of