Kreminna is a city in Sievierodonetsk Raion, Luhansk Oblast, eastern Ukraine. Prior to 2020, it served as the administrative center of formeā¦Kreminna is a city in Sievierodonetsk Raion, Luhansk Oblast, eastern Ukraine. Prior to 2020, it served as the administrative center of former Kreminna Raion. Its population was estimated at 18,116, as of January 2022.