Sievierodonetsk, Sieverodonetsk, or Severodonetsk is a city in the Luhansk Oblast of Ukraine, located to the northeast of the left bank of the Siverskyi Donets river and approximately 110 km (68 mi) to the northwest from the Oblast capital, Luhansk. It faces Lysychansk across the river. The city, whose name comes from the above-mentioned river, had a 2021 population of 101,135 (2021 est.), making it then the second most populous city in the oblast. Sievierodonetsk is a city of regional significance. It is, since June 2022, occupied and administered by Russia and the Luhansk People's Republic.Sievierodonetsk has several factories and a significant chemical production centre "Azot", part of the Ostchem group. There is also a domestic airport six km (3.7 mi) to the south of the city.Since 2014, Sievierodonetsk had served as the administrative center of Luhansk Oblast, due to the city of Luhansk falling under the control of the pro-Russian separatist Luhansk People's Republic during the...