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
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