Locations
| Title | Other names | Type | View |
|---|---|---|---|
| Republic of Lithuania | – | Nation | ℹ |
| Republic of Poland | – | Nation | ℹ |
| Rezhitsa County | bel. Рэжыцкі, latv. Rēzeknes apriņķis, pol. Rzeżycki | County | ℹ |
| Riga Governorate | – | Governorate | ℹ |
| Riga Province | – | Province | ℹ |
| Riga Viceroyalty | – | Viceroyalty | ℹ |
| Riga | – | City | ℹ |
| Russian Empire | – | Nation | ℹ |
| Russian Federation | – | Nation | ℹ |
| Ryazan Governorate | – | Governorate | ℹ |
| Rēzekne | latv. Rēzekne | City | ℹ |
| Saint Petersburg Governorate | – | Governorate | ℹ |
| Saint Petersburg | – | City | ℹ |
| Samara Governorate | – | Governorate | ℹ |
| Saratov Governorate | – | Governorate | ℹ |
| Sebezh County | bel. Себежскі, pol. Siebieski | County | ℹ |
| Sebezh | pol. Siebież | City | ℹ |
| Siberia | – | Geographic area | ℹ |
| Simbirsk Governorate | – | Governorate | ℹ |
| Smolensk Governorate | – | Governorate | ℹ |