Subregions- Belarus
 - Belarus-Russia border region
 - Belarus-Russia-Ukraine border region
 - Belarus-Ukraine border region
 - Estonia
 - Estonia-Latvia border region
 - Estonia-Latvia-Russia border region
 - Estonia-Russia border region
 - Finland
 - Finland-Russia border region
 - Gulf of Bothnia
 - Latvia
 - Latvia-Lithuania-Belarus border region
 - Latvia-Lithuania border region
 - Latvia-Russia-Belarus border region
 - Latvia-Russia border region
 - Lithuania
 - Lithuania-Belarus border region
 - Lithuania-Poland border region
 - Lithuania-Russia border region
 - northcentral Siberia, Russia
 - northwestern Russia
 - northwestern Sakha, Russia
 - northwestern Siberia, Russia
 - Norway-Russia border region
 - Russia-Belarus border region
 - Russia-Lithuania-Poland border region
 - Russia-Poland border region
 - southwestern Sakha, Russia
 - western Russia

| |