1. Albania
2. Bosnia and Herzegovina
3. Bulgaria
4. Croatia
5. Czech Republic
6. Estonia
7. Hungary
8. Kosovo
9. Latvia
10. Lithuania
11. Montenegro
12. North Macedonia
13. Poland
14. Romania
15. Russia (western part)
16. Serbia
17. Slovakia
18. Slovenia
19. Ukraine
It's important to note that the concept of Eastern Europe is influenced by historical, cultural, and political factors, and there may be variations in definitions depending on different perspectives and contexts. Some definitions may include additional countries or exclude certain ones based on specific criteria.
