List of sovereign countries with populations under 100,000, along with those slightly above this threshold that are often included in discussions of small nations:

1. **Vatican City**: ~800
2. **Nauru**: ~10,800
3. **Tuvalu**: ~11,800
4. **Palau**: ~18,000
5. **San Marino**: ~34,000
6. **Monaco**: ~39,000
7. **Liechtenstein**: ~39,000
8. **Saint Kitts and Nevis**: ~53,200
9. **Marshall Islands**: ~59,200
10. **Dominica**: ~71,800
11. **Seychelles**: ~98,000
12. **Antigua and Barbuda**: ~97,000
13. **Andorra**: ~77,000

Additionally, countries slightly above the 100,000 mark but often included in discussions about small nations:

14. **Grenada**: ~112,000
15. **Saint Vincent and the Grenadines**: ~110,000
16. **Micronesia (Federated States of)**: ~115,000
17. **Tonga**: ~105,000
18. **São Tomé and Príncipe**: ~219,000

These populations are approximate and subject to change.