Which countries shares boundaries with EU countries but are not EU members

There are several countries that share boundaries with EU countries but are not members of the EU. These countries are: 1. **Andorra**: Shares a border with France and Spain. 2. **Monaco**: Shares a border with France. 3. **San Marino**: Shares a border with Italy. 4. **Vatican City**: Shares a border with Italy. 5. **Switzerland**: Shares a border with France, Germany, Italy, and Austria. 6. **Norway**: Shares a border with Sweden, Finland, and Denmark. 7. **Iceland**: Shares a border with Norway and Denmark. 8. **Russia**: Shares a border with Finland, Norway, and Estonia. 9. **Belarus**: Shares a border with Russia, Ukraine, and Poland. 10. **Ukraine**: Shares a border with Russia, Belarus, and Poland. 11. **Moldova**: Shares a border with Ukraine and Romania. 12. **Romania**: Shares a border with Moldova and Bulgaria. 13. **Bulgaria**: Shares a border with Romania and Greece. 14. **Greece**: Shares a border with Albania and Bulgaria. 15. **Albania**: Shares a border with Greece and North Macedonia. 16. **North Macedonia**: Shares a border with Albania, Serbia, and Bulgaria. 17. **Serbia**: Shares a border with Hungary, Romania, Bulgaria, and North Macedonia. 18. **Hungary**: Shares a border with Austria, Slovakia, and Serbia. 19. **Slovakia**: Shares a border with Poland, Ukraine, Hungary, and Austria. 20. **Czech Republic**: Shares a border with Germany and Austria. These countries have varying degrees of cooperation and integration with the EU, and their relationships with the EU member states can differ depending on the specific country and its historical, political, and economic context.