Primorsk is a coastal town in Vyborgsky District of Leningrad Oblast, Russia and is the second largest Russian port on the Baltic, after St. Petersburg. It is located on the Karelian Isthmus, 137 kilometers west of St. Petersburg, at the northern coast of the Gulf of Finland, near Beryozovye Islands which are protected as a sea bird sanctuary. Population: 6,119 ; 5,332 ; 6,637 .