Ozyorny (Russian: Озёрный), formerly known as Bologoye-4[7] (Бологое-4), is a closed urban locality (an urban-type settlement) in Tver Oblast, Russia.

[8] The settlement was founded in the 1930s as a military unit serving Vypolzovo (air base) (the name of the airfield was taken from the nearby settlement of Vypolzovo).

[2] In the 1960s, the 7th Guards Rocket Division, operating strategic missiles, was relocated to the settlement and became the major employer.

In 1992 the urban-type settlement was renamed Ozyorny and officially was granted a status of a closed urban locality.

[2] Within the framework of administrative divisions, it is incorporated as Ozyorny Okrug—an administrative unit with the status equal to that of the districts.