Alexandrovsk () is a closed administrative-territorial formation in Murmansk Oblast, Russia. Its administrative center is the town of Polyarny. Population:
It was formed on May 28, 2008, when Russian President Dmitry Medvedev signed a presidential decree merging the closed-administrative formations of Polyarny, Skalisty, and Snezhnogorsk into one in order to improve efficiency.
Within the framework of administrative divisions, its status is equal to that of the districts. As a municipal division, it is incorporated as Alexandrovsk Urban Okrug.
Apart from the three towns, the formation includes five rural localities.